/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:36:15,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:36:15,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:36:15,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:36:15,778 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.epf [2022-01-18 06:36:15,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:36:15,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:36:15,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:36:15,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:36:15,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:36:15,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:36:15,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:36:15,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:36:15,809 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:36:15,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:36:15,810 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:36:15,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:36:15,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:36:15,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:36:15,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:36:15,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:36:15,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:36:15,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:36:15,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:36:15,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:36:15,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:36:15,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:36:16,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:36:16,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:36:16,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:36:16,028 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:36:16,032 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:36:16,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2022-01-18 06:36:16,033 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2022-01-18 06:36:16,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:36:16,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:36:16,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:36:16,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:36:16,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:36:16,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,089 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:36:16,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:36:16,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:36:16,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:36:16,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:36:16,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:36:16,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:36:16,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:36:16,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:36:16,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/1) ... [2022-01-18 06:36:16,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:36:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:16,143 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 06:36:16,165 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 06:36:16,177 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:36:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:36:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:36:16,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:36:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:36:16,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:36:16,178 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:36:16,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:36:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:36:16,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:36:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:36:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:36:16,180 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 06:36:16,228 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:36:16,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:36:16,297 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:36:16,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:36:16,312 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:36:16,314 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:36:16 BoogieIcfgContainer [2022-01-18 06:36:16,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:36:16,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:36:16,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:36:16,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:36:16,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:36:16" (1/2) ... [2022-01-18 06:36:16,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e12e2c8 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:36:16, skipping insertion in model container [2022-01-18 06:36:16,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:36:16" (2/2) ... [2022-01-18 06:36:16,321 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2022-01-18 06:36:16,325 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:36:16,326 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:36:16,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:36:16,326 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:36:16,356 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:36:16,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:36:16,401 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 06:36:16,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:36:16,408 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2022-01-18 06:36:16,452 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 06:36:16,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:16,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:16,463 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -511251252, now seen corresponding path program 1 times [2022-01-18 06:36:16,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716981878] [2022-01-18 06:36:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:16,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:16,667 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 06:36:16,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:16,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716981878] [2022-01-18 06:36:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716981878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:16,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:16,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 06:36:16,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387613846] [2022-01-18 06:36:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:36:16,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:36:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:36:16,697 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:16,744 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2022-01-18 06:36:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:36:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 06:36:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:16,776 INFO L225 Difference]: With dead ends: 215 [2022-01-18 06:36:16,777 INFO L226 Difference]: Without dead ends: 200 [2022-01-18 06:36:16,778 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 06:36:16,781 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:16,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-18 06:36:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2022-01-18 06:36:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2022-01-18 06:36:16,886 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2022-01-18 06:36:16,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:16,888 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2022-01-18 06:36:16,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:16,888 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2022-01-18 06:36:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:16,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:16,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:36:16,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash 74019820, now seen corresponding path program 1 times [2022-01-18 06:36:16,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617100512] [2022-01-18 06:36:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:16,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:16,963 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 06:36:16,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:16,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617100512] [2022-01-18 06:36:16,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617100512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:16,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572494550] [2022-01-18 06:36:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:16,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:16,971 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 06:36:17,014 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 06:36:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:36:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:17,106 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 06:36:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:17,181 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 06:36:17,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572494550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:17,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:17,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 06:36:17,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997125260] [2022-01-18 06:36:17,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:17,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:17,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:17,193 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:17,328 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2022-01-18 06:36:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:17,339 INFO L225 Difference]: With dead ends: 345 [2022-01-18 06:36:17,339 INFO L226 Difference]: Without dead ends: 345 [2022-01-18 06:36:17,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 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 06:36:17,345 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:17,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-18 06:36:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2022-01-18 06:36:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2022-01-18 06:36:17,384 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2022-01-18 06:36:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:17,384 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2022-01-18 06:36:17,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2022-01-18 06:36:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:17,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:17,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:17,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 06:36:17,587 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 06:36:17,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 132722862, now seen corresponding path program 1 times [2022-01-18 06:36:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:17,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071435495] [2022-01-18 06:36:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:17,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:17,625 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 06:36:17,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071435495] [2022-01-18 06:36:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071435495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:17,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:17,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:36:17,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789327119] [2022-01-18 06:36:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:36:17,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:36:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:36:17,628 INFO L87 Difference]: Start difference. First operand 174 states and 511 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:17,687 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2022-01-18 06:36:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:36:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:17,690 INFO L225 Difference]: With dead ends: 242 [2022-01-18 06:36:17,691 INFO L226 Difference]: Without dead ends: 232 [2022-01-18 06:36:17,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:36:17,694 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:17,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-18 06:36:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2022-01-18 06:36:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2022-01-18 06:36:17,714 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2022-01-18 06:36:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:17,715 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2022-01-18 06:36:17,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2022-01-18 06:36:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:17,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:17,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:17,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:36:17,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1683104426, now seen corresponding path program 1 times [2022-01-18 06:36:17,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:17,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252528126] [2022-01-18 06:36:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:17,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:17,748 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 06:36:17,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252528126] [2022-01-18 06:36:17,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252528126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:17,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:17,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:36:17,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399226970] [2022-01-18 06:36:17,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:17,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:36:17,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:36:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:36:17,750 INFO L87 Difference]: Start difference. First operand 190 states and 537 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:17,809 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2022-01-18 06:36:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:36:17,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:17,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:17,811 INFO L225 Difference]: With dead ends: 325 [2022-01-18 06:36:17,811 INFO L226 Difference]: Without dead ends: 307 [2022-01-18 06:36:17,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:36:17,812 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:17,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-18 06:36:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2022-01-18 06:36:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2022-01-18 06:36:17,825 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2022-01-18 06:36:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:17,826 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2022-01-18 06:36:17,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2022-01-18 06:36:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:17,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:17,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:17,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 06:36:17,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 105060458, now seen corresponding path program 2 times [2022-01-18 06:36:17,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:17,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112408344] [2022-01-18 06:36:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:17,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:17,888 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 06:36:17,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112408344] [2022-01-18 06:36:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112408344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:17,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:36:17,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466236621] [2022-01-18 06:36:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:36:17,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:36:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:36:17,892 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:17,963 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2022-01-18 06:36:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:36:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:17,966 INFO L225 Difference]: With dead ends: 277 [2022-01-18 06:36:17,966 INFO L226 Difference]: Without dead ends: 265 [2022-01-18 06:36:17,967 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 06:36:17,968 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:17,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-18 06:36:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2022-01-18 06:36:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2022-01-18 06:36:17,980 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2022-01-18 06:36:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:17,980 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2022-01-18 06:36:17,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2022-01-18 06:36:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:17,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:17,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:17,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 06:36:17,990 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash 671200524, now seen corresponding path program 2 times [2022-01-18 06:36:17,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631886543] [2022-01-18 06:36:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:17,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,023 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 06:36:18,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631886543] [2022-01-18 06:36:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631886543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:18,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:18,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:36:18,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90118940] [2022-01-18 06:36:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:36:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:36:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:36:18,028 INFO L87 Difference]: Start difference. First operand 212 states and 598 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:18,078 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2022-01-18 06:36:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:36:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:18,081 INFO L225 Difference]: With dead ends: 275 [2022-01-18 06:36:18,081 INFO L226 Difference]: Without dead ends: 261 [2022-01-18 06:36:18,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:36:18,083 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:18,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 21 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-18 06:36:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2022-01-18 06:36:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2022-01-18 06:36:18,092 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2022-01-18 06:36:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:18,092 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2022-01-18 06:36:18,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2022-01-18 06:36:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:18,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:18,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:18,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 06:36:18,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash -945431028, now seen corresponding path program 3 times [2022-01-18 06:36:18,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:18,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64945981] [2022-01-18 06:36:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,154 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 06:36:18,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64945981] [2022-01-18 06:36:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64945981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:18,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:18,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:36:18,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976631457] [2022-01-18 06:36:18,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:18,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:36:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:36:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:36:18,157 INFO L87 Difference]: Start difference. First operand 215 states and 610 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:18,198 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2022-01-18 06:36:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:36:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:18,200 INFO L225 Difference]: With dead ends: 222 [2022-01-18 06:36:18,201 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 06:36:18,201 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 06:36:18,201 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:18,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 06:36:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2022-01-18 06:36:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2022-01-18 06:36:18,209 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2022-01-18 06:36:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2022-01-18 06:36:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2022-01-18 06:36:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:18,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:18,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 06:36:18,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2121095062, now seen corresponding path program 4 times [2022-01-18 06:36:18,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:18,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846540233] [2022-01-18 06:36:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,279 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 06:36:18,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:18,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846540233] [2022-01-18 06:36:18,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846540233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:18,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:18,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:36:18,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063207066] [2022-01-18 06:36:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:36:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:36:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:36:18,281 INFO L87 Difference]: Start difference. First operand 213 states and 608 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:18,316 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2022-01-18 06:36:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:36:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:18,318 INFO L225 Difference]: With dead ends: 226 [2022-01-18 06:36:18,319 INFO L226 Difference]: Without dead ends: 226 [2022-01-18 06:36:18,319 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 06:36:18,321 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:18,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-18 06:36:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2022-01-18 06:36:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2022-01-18 06:36:18,328 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2022-01-18 06:36:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:18,330 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2022-01-18 06:36:18,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2022-01-18 06:36:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:36:18,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:18,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 06:36:18,333 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash -552220694, now seen corresponding path program 5 times [2022-01-18 06:36:18,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274898255] [2022-01-18 06:36:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,397 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 06:36:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274898255] [2022-01-18 06:36:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274898255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:36:18,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:36:18,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:36:18,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088581475] [2022-01-18 06:36:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:36:18,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:36:18,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:36:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:36:18,399 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:18,450 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2022-01-18 06:36:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:36:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:36:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:18,452 INFO L225 Difference]: With dead ends: 212 [2022-01-18 06:36:18,452 INFO L226 Difference]: Without dead ends: 204 [2022-01-18 06:36:18,452 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 06:36:18,454 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:18,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:36:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-18 06:36:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2022-01-18 06:36:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2022-01-18 06:36:18,471 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2022-01-18 06:36:18,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:18,472 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2022-01-18 06:36:18,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2022-01-18 06:36:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:36:18,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:18,473 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] [2022-01-18 06:36:18,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 06:36:18,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -62492722, now seen corresponding path program 1 times [2022-01-18 06:36:18,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:18,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290460395] [2022-01-18 06:36:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:18,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290460395] [2022-01-18 06:36:18,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290460395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489466765] [2022-01-18 06:36:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:18,508 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 06:36:18,512 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 06:36:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 06:36:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:18,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:18,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489466765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:18,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:18,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 06:36:18,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048374133] [2022-01-18 06:36:18,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:18,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:18,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:18,665 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 06:36:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:18,726 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2022-01-18 06:36:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 20 [2022-01-18 06:36:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:18,729 INFO L225 Difference]: With dead ends: 251 [2022-01-18 06:36:18,729 INFO L226 Difference]: Without dead ends: 251 [2022-01-18 06:36:18,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 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 06:36:18,730 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:18,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-18 06:36:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2022-01-18 06:36:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2022-01-18 06:36:18,737 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2022-01-18 06:36:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2022-01-18 06:36:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 06:36:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2022-01-18 06:36:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:18,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:18,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:18,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:18,951 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,SelfDestructingSolverStorable9 [2022-01-18 06:36:18,951 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash -851645140, now seen corresponding path program 1 times [2022-01-18 06:36:18,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229898763] [2022-01-18 06:36:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:18,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:19,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:19,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229898763] [2022-01-18 06:36:19,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229898763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:19,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470694182] [2022-01-18 06:36:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:19,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:19,036 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 06:36:19,037 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 06:36:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:19,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-01-18 06:36:19,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:36:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:19,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:19,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:19,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:36:19,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 06:36:19,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:19,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 06:36:19,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:36:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:19,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470694182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:19,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:19,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:36:19,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809206911] [2022-01-18 06:36:19,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:19,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:19,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:19,587 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:19,703 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2022-01-18 06:36:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 22 [2022-01-18 06:36:19,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:19,706 INFO L225 Difference]: With dead ends: 377 [2022-01-18 06:36:19,706 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 06:36:19,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:19,707 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:19,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 06:36:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2022-01-18 06:36:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2022-01-18 06:36:19,716 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2022-01-18 06:36:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:19,716 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2022-01-18 06:36:19,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2022-01-18 06:36:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:19,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:19,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:19,739 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 06:36:19,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:19,940 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1414924140, now seen corresponding path program 2 times [2022-01-18 06:36:19,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919590483] [2022-01-18 06:36:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:19,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:20,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919590483] [2022-01-18 06:36:20,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919590483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58281624] [2022-01-18 06:36:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:20,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:20,017 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 06:36:20,019 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 06:36:20,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:20,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-18 06:36:20,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 06:36:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:20,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:20,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:20,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:36:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 06:36:20,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:20,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 06:36:20,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:36:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:20,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58281624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:20,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:20,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:36:20,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111677190] [2022-01-18 06:36:20,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:20,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:20,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:20,540 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 06:36:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:20,650 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2022-01-18 06:36:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 22 [2022-01-18 06:36:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:20,652 INFO L225 Difference]: With dead ends: 402 [2022-01-18 06:36:20,652 INFO L226 Difference]: Without dead ends: 387 [2022-01-18 06:36:20,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:20,653 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:20,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-18 06:36:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2022-01-18 06:36:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2022-01-18 06:36:20,661 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2022-01-18 06:36:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:20,662 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2022-01-18 06:36:20,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 06:36:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2022-01-18 06:36:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:20,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:20,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:20,687 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 06:36:20,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:20,883 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1944109140, now seen corresponding path program 3 times [2022-01-18 06:36:20,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112823241] [2022-01-18 06:36:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:20,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:20,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112823241] [2022-01-18 06:36:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112823241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768263874] [2022-01-18 06:36:20,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:36:20,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:20,981 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 06:36:20,982 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 06:36:21,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:36:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:21,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:21,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 06:36:21,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 06:36:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:21,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:21,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:21,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:36:21,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 06:36:21,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:21,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 06:36:21,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:36:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:21,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768263874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:21,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:21,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:36:21,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107951921] [2022-01-18 06:36:21,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:21,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:21,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:21,445 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:21,582 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2022-01-18 06:36:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 22 [2022-01-18 06:36:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:21,585 INFO L225 Difference]: With dead ends: 461 [2022-01-18 06:36:21,585 INFO L226 Difference]: Without dead ends: 446 [2022-01-18 06:36:21,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:21,586 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:21,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-18 06:36:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2022-01-18 06:36:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2022-01-18 06:36:21,595 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2022-01-18 06:36:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:21,595 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2022-01-18 06:36:21,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2022-01-18 06:36:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:21,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:21,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:21,818 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,SelfDestructingSolverStorable12 [2022-01-18 06:36:21,819 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1813144784, now seen corresponding path program 4 times [2022-01-18 06:36:21,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:21,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080260263] [2022-01-18 06:36:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:21,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:21,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:21,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080260263] [2022-01-18 06:36:21,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080260263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:21,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112905891] [2022-01-18 06:36:21,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:36:21,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:21,909 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 06:36:21,932 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 06:36:21,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:36:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:21,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:22,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-01-18 06:36:22,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 06:36:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:22,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:22,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:22,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-01-18 06:36:22,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 06:36:22,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:22,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 06:36:22,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2022-01-18 06:36:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:22,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112905891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:22,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:22,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:36:22,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691021826] [2022-01-18 06:36:22,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:22,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:22,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:22,359 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:22,472 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-01-18 06:36:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:36:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:22,475 INFO L225 Difference]: With dead ends: 435 [2022-01-18 06:36:22,475 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 06:36:22,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:22,475 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:22,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 93 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 06:36:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2022-01-18 06:36:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2022-01-18 06:36:22,485 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2022-01-18 06:36:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:22,486 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2022-01-18 06:36:22,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:22,486 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2022-01-18 06:36:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:22,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:22,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:22,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:22,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:22,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:22,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1947787600, now seen corresponding path program 5 times [2022-01-18 06:36:22,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041441459] [2022-01-18 06:36:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:22,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:22,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041441459] [2022-01-18 06:36:22,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041441459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:22,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197653138] [2022-01-18 06:36:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:22,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:22,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:22,780 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 06:36:22,812 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 06:36:22,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:22,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:22,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:22,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:22,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 06:36:23,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 06:36:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:23,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:23,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:23,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-01-18 06:36:23,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:23,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2022-01-18 06:36:23,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 06:36:23,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:36:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:23,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197653138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:23,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:23,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:36:23,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303469009] [2022-01-18 06:36:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:23,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:36:23,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:36:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:23,259 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 06:36:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:23,363 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2022-01-18 06:36:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 22 [2022-01-18 06:36:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:23,366 INFO L225 Difference]: With dead ends: 471 [2022-01-18 06:36:23,366 INFO L226 Difference]: Without dead ends: 456 [2022-01-18 06:36:23,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:23,367 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:23,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 93 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-18 06:36:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2022-01-18 06:36:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-01-18 06:36:23,377 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-01-18 06:36:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:23,377 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-01-18 06:36:23,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 06:36:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-01-18 06:36:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:36:23,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:23,378 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:23,402 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 06:36:23,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:23,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1359688084, now seen corresponding path program 6 times [2022-01-18 06:36:23,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589270799] [2022-01-18 06:36:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:23,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589270799] [2022-01-18 06:36:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589270799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728023669] [2022-01-18 06:36:23,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:23,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:23,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:36:23,709 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 06:36:23,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:36:23,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 06:36:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:23,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 06:36:23,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-18 06:36:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:23,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:23,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:23,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-01-18 06:36:23,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:23,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:36:24,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-18 06:36:24,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:36:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:24,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728023669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:24,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:24,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:36:24,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643580488] [2022-01-18 06:36:24,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:24,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:36:24,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:36:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:24,095 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:24,204 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2022-01-18 06:36:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 06:36:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:36:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:24,207 INFO L225 Difference]: With dead ends: 463 [2022-01-18 06:36:24,207 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 06:36:24,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:24,208 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:24,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 98 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 06:36:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2022-01-18 06:36:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2022-01-18 06:36:24,218 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2022-01-18 06:36:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:24,218 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2022-01-18 06:36:24,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2022-01-18 06:36:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:24,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:24,219 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] [2022-01-18 06:36:24,243 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 06:36:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 06:36:24,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1997398602, now seen corresponding path program 7 times [2022-01-18 06:36:24,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627992725] [2022-01-18 06:36:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:24,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:24,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627992725] [2022-01-18 06:36:24,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627992725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454548777] [2022-01-18 06:36:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:36:24,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:24,465 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 06:36:24,466 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 06:36:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:24,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:24,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454548777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:24,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:24,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:36:24,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846765585] [2022-01-18 06:36:24,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:24,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:36:24,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:36:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:36:24,577 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:24,682 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2022-01-18 06:36:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:24,687 INFO L225 Difference]: With dead ends: 800 [2022-01-18 06:36:24,687 INFO L226 Difference]: Without dead ends: 800 [2022-01-18 06:36:24,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:36:24,688 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:24,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-18 06:36:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2022-01-18 06:36:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2022-01-18 06:36:24,701 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2022-01-18 06:36:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:24,701 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2022-01-18 06:36:24,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2022-01-18 06:36:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:24,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:24,703 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] [2022-01-18 06:36:24,727 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 06:36:24,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 06:36:24,917 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1419061262, now seen corresponding path program 8 times [2022-01-18 06:36:24,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:24,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407126267] [2022-01-18 06:36:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:24,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:24,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:24,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407126267] [2022-01-18 06:36:24,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407126267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:24,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524156988] [2022-01-18 06:36:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:24,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:24,950 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 06:36:24,958 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 06:36:24,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:36:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:25,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:25,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524156988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:25,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:25,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:36:25,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619537785] [2022-01-18 06:36:25,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:36:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:36:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:25,101 INFO L87 Difference]: Start difference. First operand 428 states and 1322 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 06:36:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:25,512 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2022-01-18 06:36:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:36:25,512 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 24 [2022-01-18 06:36:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:25,519 INFO L225 Difference]: With dead ends: 1302 [2022-01-18 06:36:25,519 INFO L226 Difference]: Without dead ends: 1252 [2022-01-18 06:36:25,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:36:25,520 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 260 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:25,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 71 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:36:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-01-18 06:36:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2022-01-18 06:36:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2022-01-18 06:36:25,543 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2022-01-18 06:36:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:25,543 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2022-01-18 06:36:25,544 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 06:36:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2022-01-18 06:36:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:25,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:25,545 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] [2022-01-18 06:36:25,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:25,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:36:25,760 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 982092554, now seen corresponding path program 9 times [2022-01-18 06:36:25,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:25,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589003612] [2022-01-18 06:36:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:25,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:25,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589003612] [2022-01-18 06:36:25,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589003612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881933229] [2022-01-18 06:36:25,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:36:25,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:25,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:25,789 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 06:36:25,791 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 06:36:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:36:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:25,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:25,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881933229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:25,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:25,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 06:36:25,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582998783] [2022-01-18 06:36:25,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:25,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:36:25,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:36:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:36:25,902 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:26,015 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2022-01-18 06:36:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:26,023 INFO L225 Difference]: With dead ends: 1440 [2022-01-18 06:36:26,023 INFO L226 Difference]: Without dead ends: 1297 [2022-01-18 06:36:26,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:26,024 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:26,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 51 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-01-18 06:36:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2022-01-18 06:36:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2022-01-18 06:36:26,055 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2022-01-18 06:36:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2022-01-18 06:36:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2022-01-18 06:36:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:26,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:26,058 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] [2022-01-18 06:36:26,083 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 06:36:26,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:26,281 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1416074220, now seen corresponding path program 10 times [2022-01-18 06:36:26,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952989797] [2022-01-18 06:36:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:26,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:26,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952989797] [2022-01-18 06:36:26,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952989797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:26,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156383363] [2022-01-18 06:36:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:36:26,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:26,327 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 06:36:26,337 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 06:36:26,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:36:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:26,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156383363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:26,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:26,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:26,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528602053] [2022-01-18 06:36:26,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:26,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:26,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:26,443 INFO L87 Difference]: Start difference. First operand 986 states and 3247 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 06:36:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:26,536 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2022-01-18 06:36:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:36:26,536 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 24 [2022-01-18 06:36:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:26,543 INFO L225 Difference]: With dead ends: 1349 [2022-01-18 06:36:26,543 INFO L226 Difference]: Without dead ends: 1343 [2022-01-18 06:36:26,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:36:26,545 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:26,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-01-18 06:36:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2022-01-18 06:36:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2022-01-18 06:36:26,583 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2022-01-18 06:36:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:26,583 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2022-01-18 06:36:26,583 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 06:36:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2022-01-18 06:36:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:26,587 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] [2022-01-18 06:36:26,611 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 06:36:26,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:26,803 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash -243104664, now seen corresponding path program 11 times [2022-01-18 06:36:26,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238558096] [2022-01-18 06:36:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:26,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:26,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238558096] [2022-01-18 06:36:26,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238558096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449397349] [2022-01-18 06:36:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:26,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:26,847 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 06:36:26,867 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 06:36:26,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:36:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:36:26,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:26,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449397349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:26,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:26,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-18 06:36:26,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614936920] [2022-01-18 06:36:26,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:26,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 06:36:26,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 06:36:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:36:26,984 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:27,081 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2022-01-18 06:36:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:27,092 INFO L225 Difference]: With dead ends: 2033 [2022-01-18 06:36:27,092 INFO L226 Difference]: Without dead ends: 2018 [2022-01-18 06:36:27,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:27,093 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:27,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 42 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-01-18 06:36:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2022-01-18 06:36:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2022-01-18 06:36:27,145 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2022-01-18 06:36:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:27,146 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2022-01-18 06:36:27,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2022-01-18 06:36:27,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:27,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:27,150 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] [2022-01-18 06:36:27,172 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 06:36:27,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-18 06:36:27,368 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1639204200, now seen corresponding path program 12 times [2022-01-18 06:36:27,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:27,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872483605] [2022-01-18 06:36:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:27,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:27,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872483605] [2022-01-18 06:36:27,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872483605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146792919] [2022-01-18 06:36:27,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:27,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:27,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:27,406 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 06:36:27,407 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 06:36:27,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:36:27,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:27,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:27,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146792919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:27,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:27,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:27,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025898967] [2022-01-18 06:36:27,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:27,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:27,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:27,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:27,521 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 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 06:36:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:27,612 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2022-01-18 06:36:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:27,612 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 24 [2022-01-18 06:36:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:27,621 INFO L225 Difference]: With dead ends: 1938 [2022-01-18 06:36:27,621 INFO L226 Difference]: Without dead ends: 1922 [2022-01-18 06:36:27,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:27,622 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:27,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 48 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-01-18 06:36:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2022-01-18 06:36:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2022-01-18 06:36:27,664 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2022-01-18 06:36:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:27,664 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2022-01-18 06:36:27,665 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 06:36:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2022-01-18 06:36:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:27,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:27,668 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] [2022-01-18 06:36:27,691 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 06:36:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:27,883 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1856306738, now seen corresponding path program 13 times [2022-01-18 06:36:27,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:27,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595130388] [2022-01-18 06:36:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:27,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:27,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:27,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595130388] [2022-01-18 06:36:27,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595130388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:27,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579043764] [2022-01-18 06:36:27,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:36:27,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:27,911 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 06:36:27,912 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 06:36:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:27,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:28,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579043764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:28,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:28,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:28,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549189823] [2022-01-18 06:36:28,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:28,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:28,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:28,016 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 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 06:36:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:28,116 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2022-01-18 06:36:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:36:28,116 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 24 [2022-01-18 06:36:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:28,131 INFO L225 Difference]: With dead ends: 2961 [2022-01-18 06:36:28,132 INFO L226 Difference]: Without dead ends: 2952 [2022-01-18 06:36:28,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:36:28,132 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:28,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-01-18 06:36:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2022-01-18 06:36:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2022-01-18 06:36:28,196 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2022-01-18 06:36:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:28,196 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2022-01-18 06:36:28,196 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 06:36:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2022-01-18 06:36:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:28,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:28,201 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] [2022-01-18 06:36:28,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:28,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:28,421 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -266436362, now seen corresponding path program 14 times [2022-01-18 06:36:28,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:28,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446348508] [2022-01-18 06:36:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:28,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:28,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446348508] [2022-01-18 06:36:28,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446348508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109040408] [2022-01-18 06:36:28,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:28,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:28,450 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 06:36:28,451 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 06:36:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:28,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:28,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109040408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:28,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:28,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:28,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588402787] [2022-01-18 06:36:28,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:28,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:28,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:28,557 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 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 06:36:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:28,662 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2022-01-18 06:36:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:28,662 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 24 [2022-01-18 06:36:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:28,676 INFO L225 Difference]: With dead ends: 3041 [2022-01-18 06:36:28,676 INFO L226 Difference]: Without dead ends: 3041 [2022-01-18 06:36:28,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:28,680 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:28,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 61 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-01-18 06:36:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2022-01-18 06:36:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2022-01-18 06:36:28,743 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2022-01-18 06:36:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:28,743 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2022-01-18 06:36:28,744 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 06:36:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2022-01-18 06:36:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:28,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:28,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:28,773 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 06:36:28,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 06:36:28,971 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -993594422, now seen corresponding path program 15 times [2022-01-18 06:36:28,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:28,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071764229] [2022-01-18 06:36:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:28,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:28,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:28,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071764229] [2022-01-18 06:36:28,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071764229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:28,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277895082] [2022-01-18 06:36:28,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:36:28,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:28,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:29,000 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 06:36:29,002 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 06:36:29,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:36:29,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277895082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:29,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 06:36:29,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554012071] [2022-01-18 06:36:29,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:29,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:36:29,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:36:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:36:29,153 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 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 06:36:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:29,736 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2022-01-18 06:36:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:36:29,737 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 24 [2022-01-18 06:36:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:29,765 INFO L225 Difference]: With dead ends: 9230 [2022-01-18 06:36:29,765 INFO L226 Difference]: Without dead ends: 8962 [2022-01-18 06:36:29,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 06:36:29,767 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 352 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:29,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 157 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:36:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2022-01-18 06:36:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2022-01-18 06:36:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2022-01-18 06:36:29,969 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2022-01-18 06:36:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:29,969 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2022-01-18 06:36:29,969 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 06:36:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2022-01-18 06:36:29,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:29,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:29,981 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] [2022-01-18 06:36:30,005 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 06:36:30,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:30,203 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:30,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2078630128, now seen corresponding path program 16 times [2022-01-18 06:36:30,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:30,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121324458] [2022-01-18 06:36:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:30,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:30,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121324458] [2022-01-18 06:36:30,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121324458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:30,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292235427] [2022-01-18 06:36:30,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:36:30,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:30,230 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 06:36:30,236 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 06:36:30,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:36:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:36:30,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:36:30,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292235427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:30,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:30,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:30,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638477286] [2022-01-18 06:36:30,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:30,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:30,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:30,333 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 06:36:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:30,427 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2022-01-18 06:36:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:36:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 24 [2022-01-18 06:36:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:30,444 INFO L225 Difference]: With dead ends: 5640 [2022-01-18 06:36:30,444 INFO L226 Difference]: Without dead ends: 5614 [2022-01-18 06:36:30,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:36:30,445 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:30,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2022-01-18 06:36:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2022-01-18 06:36:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2022-01-18 06:36:30,578 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2022-01-18 06:36:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:30,578 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2022-01-18 06:36:30,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 06:36:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2022-01-18 06:36:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:30,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:30,590 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] [2022-01-18 06:36:30,615 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 06:36:30,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:30,803 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash 319339466, now seen corresponding path program 17 times [2022-01-18 06:36:30,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:30,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218684304] [2022-01-18 06:36:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:30,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:30,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218684304] [2022-01-18 06:36:30,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218684304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622306161] [2022-01-18 06:36:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:30,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:30,830 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 06:36:30,831 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 06:36:30,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:36:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:30,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622306161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:30,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:30,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 06:36:30,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771693668] [2022-01-18 06:36:30,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:30,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 06:36:30,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:30,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 06:36:30,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:36:30,947 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 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 06:36:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:31,166 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2022-01-18 06:36:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:36:31,167 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 24 [2022-01-18 06:36:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:31,185 INFO L225 Difference]: With dead ends: 6419 [2022-01-18 06:36:31,185 INFO L226 Difference]: Without dead ends: 6345 [2022-01-18 06:36:31,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:36:31,186 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:31,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 47 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2022-01-18 06:36:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2022-01-18 06:36:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2022-01-18 06:36:31,293 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2022-01-18 06:36:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:31,293 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2022-01-18 06:36:31,293 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 06:36:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2022-01-18 06:36:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:31,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:31,305 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] [2022-01-18 06:36:31,327 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 06:36:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:31,519 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1402063808, now seen corresponding path program 18 times [2022-01-18 06:36:31,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:31,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225170278] [2022-01-18 06:36:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:31,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:31,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225170278] [2022-01-18 06:36:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225170278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023649889] [2022-01-18 06:36:31,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:31,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:31,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:31,547 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 06:36:31,559 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 06:36:31,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:36:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:31,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:31,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:31,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023649889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:31,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:31,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:31,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86577071] [2022-01-18 06:36:31,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:31,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:31,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:31,648 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:31,739 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2022-01-18 06:36:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 06:36:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:31,753 INFO L225 Difference]: With dead ends: 5931 [2022-01-18 06:36:31,753 INFO L226 Difference]: Without dead ends: 5906 [2022-01-18 06:36:31,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 06:36:31,754 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:31,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2022-01-18 06:36:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2022-01-18 06:36:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2022-01-18 06:36:31,917 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2022-01-18 06:36:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:31,918 INFO L470 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2022-01-18 06:36:31,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2022-01-18 06:36:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:31,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:31,929 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] [2022-01-18 06:36:31,950 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 06:36:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 06:36:32,143 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -199751440, now seen corresponding path program 19 times [2022-01-18 06:36:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:32,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393684330] [2022-01-18 06:36:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:32,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393684330] [2022-01-18 06:36:32,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393684330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155862268] [2022-01-18 06:36:32,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:36:32,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:32,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:32,173 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 06:36:32,174 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 06:36:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:36:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:32,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:36:32,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155862268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:32,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:32,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 06:36:32,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683289484] [2022-01-18 06:36:32,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:32,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 06:36:32,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 06:36:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 06:36:32,275 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:32,371 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2022-01-18 06:36:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 06:36:32,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:32,383 INFO L225 Difference]: With dead ends: 6187 [2022-01-18 06:36:32,383 INFO L226 Difference]: Without dead ends: 6177 [2022-01-18 06:36:32,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:32,383 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:32,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 51 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-01-18 06:36:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2022-01-18 06:36:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2022-01-18 06:36:32,499 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2022-01-18 06:36:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:32,499 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2022-01-18 06:36:32,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2022-01-18 06:36:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:32,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:32,511 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] [2022-01-18 06:36:32,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:32,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 06:36:32,733 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1472685148, now seen corresponding path program 20 times [2022-01-18 06:36:32,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520911259] [2022-01-18 06:36:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:32,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:32,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520911259] [2022-01-18 06:36:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520911259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:32,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597849483] [2022-01-18 06:36:32,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:32,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:32,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:32,762 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 06:36:32,762 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 06:36:32,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:32,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:36:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:32,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:32,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597849483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:32,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:32,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:36:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212439557] [2022-01-18 06:36:32,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:32,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:32,891 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:33,291 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2022-01-18 06:36:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:36:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 24 [2022-01-18 06:36:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:33,307 INFO L225 Difference]: With dead ends: 7179 [2022-01-18 06:36:33,308 INFO L226 Difference]: Without dead ends: 7111 [2022-01-18 06:36:33,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:36:33,309 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 182 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:33,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 107 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:36:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2022-01-18 06:36:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2022-01-18 06:36:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2022-01-18 06:36:33,433 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2022-01-18 06:36:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:33,433 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2022-01-18 06:36:33,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 06:36:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2022-01-18 06:36:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:33,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:33,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:33,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 06:36:33,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:33,655 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash 828713550, now seen corresponding path program 21 times [2022-01-18 06:36:33,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:33,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949021010] [2022-01-18 06:36:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:33,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:33,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949021010] [2022-01-18 06:36:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949021010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:33,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441432256] [2022-01-18 06:36:33,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:36:33,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:33,687 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 06:36:33,713 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 06:36:33,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:36:33,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:36:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:36:33,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 06:36:33,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441432256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:33,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:33,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 06:36:33,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109352021] [2022-01-18 06:36:33,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:33,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:33,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:33,816 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 06:36:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:34,292 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2022-01-18 06:36:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 06:36:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 24 [2022-01-18 06:36:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:34,321 INFO L225 Difference]: With dead ends: 11751 [2022-01-18 06:36:34,322 INFO L226 Difference]: Without dead ends: 11587 [2022-01-18 06:36:34,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:36:34,322 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 318 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:34,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 87 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:36:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2022-01-18 06:36:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2022-01-18 06:36:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2022-01-18 06:36:34,514 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2022-01-18 06:36:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:34,514 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2022-01-18 06:36:34,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 06:36:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2022-01-18 06:36:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:36:34,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:34,533 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] [2022-01-18 06:36:34,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:34,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:34,756 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1031366276, now seen corresponding path program 22 times [2022-01-18 06:36:34,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:34,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836620764] [2022-01-18 06:36:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:34,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:34,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836620764] [2022-01-18 06:36:34,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836620764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:34,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108553731] [2022-01-18 06:36:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:36:34,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:34,792 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 06:36:34,793 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 06:36:34,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:36:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 06:36:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:34,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:34,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108553731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:34,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:34,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 06:36:34,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654192323] [2022-01-18 06:36:34,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:36:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:36:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:36:34,904 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:35,069 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2022-01-18 06:36:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:36:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:36:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:35,092 INFO L225 Difference]: With dead ends: 9470 [2022-01-18 06:36:35,093 INFO L226 Difference]: Without dead ends: 9392 [2022-01-18 06:36:35,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:36:35,093 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:35,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 66 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:36:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2022-01-18 06:36:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2022-01-18 06:36:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2022-01-18 06:36:35,247 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2022-01-18 06:36:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:35,247 INFO L470 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2022-01-18 06:36:35,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2022-01-18 06:36:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:35,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:35,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:35,290 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 06:36:35,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:35,475 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash 213109642, now seen corresponding path program 23 times [2022-01-18 06:36:35,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554229164] [2022-01-18 06:36:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:35,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:35,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554229164] [2022-01-18 06:36:35,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554229164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982946396] [2022-01-18 06:36:35,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:35,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:35,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:35,757 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 06:36:35,758 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 06:36:35,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:36:35,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:36,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:36,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:36:36,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:36:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:36,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:36,511 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:36,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:36,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:36,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:36,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,706 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:36,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:36,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:36,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:36,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982946396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:36,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:36,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:36,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334471413] [2022-01-18 06:36:36,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:36,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:36,848 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:37,384 INFO L93 Difference]: Finished difference Result 11612 states and 42094 transitions. [2022-01-18 06:36:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:36:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:37,419 INFO L225 Difference]: With dead ends: 11612 [2022-01-18 06:36:37,419 INFO L226 Difference]: Without dead ends: 11609 [2022-01-18 06:36:37,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:36:37,420 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:37,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 254 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 475 Invalid, 0 Unknown, 326 Unchecked, 0.3s Time] [2022-01-18 06:36:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11609 states. [2022-01-18 06:36:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11609 to 8581. [2022-01-18 06:36:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.7157342657342656) internal successors, (31881), 8580 states have internal predecessors, (31881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 31881 transitions. [2022-01-18 06:36:37,627 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 31881 transitions. Word has length 28 [2022-01-18 06:36:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:37,628 INFO L470 AbstractCegarLoop]: Abstraction has 8581 states and 31881 transitions. [2022-01-18 06:36:37,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 31881 transitions. [2022-01-18 06:36:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:37,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:37,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:37,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 06:36:37,862 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:37,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1560240398, now seen corresponding path program 24 times [2022-01-18 06:36:37,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498556569] [2022-01-18 06:36:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:37,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:38,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498556569] [2022-01-18 06:36:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498556569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656231991] [2022-01-18 06:36:38,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:38,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:38,105 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 06:36:38,105 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 06:36:38,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:36:38,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:38,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:38,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:38,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:38,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:36:38,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:36:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:38,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:38,792 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:38,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:38,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:38,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:38,987 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:38,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:39,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:39,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:39,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:39,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656231991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:39,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:39,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:39,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828595408] [2022-01-18 06:36:39,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:39,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:39,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:39,163 INFO L87 Difference]: Start difference. First operand 8581 states and 31881 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:39,710 INFO L93 Difference]: Finished difference Result 11632 states and 42147 transitions. [2022-01-18 06:36:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 06:36:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:39,745 INFO L225 Difference]: With dead ends: 11632 [2022-01-18 06:36:39,746 INFO L226 Difference]: Without dead ends: 11629 [2022-01-18 06:36:39,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:36:39,746 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:39,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 275 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 512 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2022-01-18 06:36:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11629 states. [2022-01-18 06:36:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11629 to 8593. [2022-01-18 06:36:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8593 states, 8592 states have (on average 3.7138035381750467) internal successors, (31909), 8592 states have internal predecessors, (31909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 31909 transitions. [2022-01-18 06:36:39,943 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 31909 transitions. Word has length 28 [2022-01-18 06:36:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:39,943 INFO L470 AbstractCegarLoop]: Abstraction has 8593 states and 31909 transitions. [2022-01-18 06:36:39,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 31909 transitions. [2022-01-18 06:36:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:39,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:39,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:39,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:40,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-18 06:36:40,159 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1601865618, now seen corresponding path program 25 times [2022-01-18 06:36:40,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:40,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347869510] [2022-01-18 06:36:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:40,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:40,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347869510] [2022-01-18 06:36:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347869510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509771710] [2022-01-18 06:36:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:36:40,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:40,387 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 06:36:40,389 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 06:36:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:40,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:36:40,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:36:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:40,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:36:40,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:36:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:40,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:41,020 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:41,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:41,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:41,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:41,199 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:41,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:41,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:41,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:41,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:41,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509771710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:41,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:41,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:41,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594818098] [2022-01-18 06:36:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:41,337 INFO L87 Difference]: Start difference. First operand 8593 states and 31909 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:41,948 INFO L93 Difference]: Finished difference Result 11665 states and 42260 transitions. [2022-01-18 06:36:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 06:36:41,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:41,973 INFO L225 Difference]: With dead ends: 11665 [2022-01-18 06:36:41,973 INFO L226 Difference]: Without dead ends: 11650 [2022-01-18 06:36:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:36:41,973 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:41,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 303 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 715 Invalid, 0 Unknown, 465 Unchecked, 0.3s Time] [2022-01-18 06:36:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11650 states. [2022-01-18 06:36:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11650 to 8655. [2022-01-18 06:36:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8655 states, 8654 states have (on average 3.7110006933210076) internal successors, (32115), 8654 states have internal predecessors, (32115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 32115 transitions. [2022-01-18 06:36:42,153 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 32115 transitions. Word has length 28 [2022-01-18 06:36:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:42,153 INFO L470 AbstractCegarLoop]: Abstraction has 8655 states and 32115 transitions. [2022-01-18 06:36:42,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 32115 transitions. [2022-01-18 06:36:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:42,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:42,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:42,181 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 06:36:42,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 06:36:42,367 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:42,368 INFO L85 PathProgramCache]: Analyzing trace with hash 837768650, now seen corresponding path program 26 times [2022-01-18 06:36:42,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:42,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876188380] [2022-01-18 06:36:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:42,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:42,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876188380] [2022-01-18 06:36:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876188380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021533812] [2022-01-18 06:36:42,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:42,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:42,580 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 06:36:42,595 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 06:36:42,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:42,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:43,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:36:43,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-18 06:36:43,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:43,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 06:36:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:43,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:43,214 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:43,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:43,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:43,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:43,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,369 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:43,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:43,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:43,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:43,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021533812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:43,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:43,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:43,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778424300] [2022-01-18 06:36:43,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:43,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:43,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:43,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:43,511 INFO L87 Difference]: Start difference. First operand 8655 states and 32115 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:44,093 INFO L93 Difference]: Finished difference Result 11796 states and 42646 transitions. [2022-01-18 06:36:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:36:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:44,118 INFO L225 Difference]: With dead ends: 11796 [2022-01-18 06:36:44,118 INFO L226 Difference]: Without dead ends: 11740 [2022-01-18 06:36:44,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:36:44,120 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:44,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 249 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 310 Unchecked, 0.3s Time] [2022-01-18 06:36:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11740 states. [2022-01-18 06:36:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11740 to 8708. [2022-01-18 06:36:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8708 states, 8707 states have (on average 3.7060985414034686) internal successors, (32269), 8707 states have internal predecessors, (32269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8708 states to 8708 states and 32269 transitions. [2022-01-18 06:36:44,350 INFO L78 Accepts]: Start accepts. Automaton has 8708 states and 32269 transitions. Word has length 28 [2022-01-18 06:36:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:44,350 INFO L470 AbstractCegarLoop]: Abstraction has 8708 states and 32269 transitions. [2022-01-18 06:36:44,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8708 states and 32269 transitions. [2022-01-18 06:36:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:44,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:44,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:44,378 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 06:36:44,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:44,564 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1190629366, now seen corresponding path program 27 times [2022-01-18 06:36:44,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700378367] [2022-01-18 06:36:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:44,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:44,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700378367] [2022-01-18 06:36:44,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700378367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217407262] [2022-01-18 06:36:44,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:36:44,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:44,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:44,805 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 06:36:44,806 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 06:36:44,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:36:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:36:44,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:45,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:45,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:36:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:45,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:45,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2022-01-18 06:36:45,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:45,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 72 [2022-01-18 06:36:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:46,279 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:36:46,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 79 [2022-01-18 06:36:46,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:46,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:36:46,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-01-18 06:36:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217407262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:47,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:47,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:36:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079780626] [2022-01-18 06:36:47,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:47,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:36:47,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:36:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:36:47,167 INFO L87 Difference]: Start difference. First operand 8708 states and 32269 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:48,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:48,886 INFO L93 Difference]: Finished difference Result 18757 states and 66076 transitions. [2022-01-18 06:36:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:36:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:48,942 INFO L225 Difference]: With dead ends: 18757 [2022-01-18 06:36:48,942 INFO L226 Difference]: Without dead ends: 18743 [2022-01-18 06:36:48,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:36:48,943 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:48,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 431 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 596 Invalid, 0 Unknown, 707 Unchecked, 0.3s Time] [2022-01-18 06:36:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18743 states. [2022-01-18 06:36:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18743 to 8752. [2022-01-18 06:36:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 8751 states have (on average 3.701405553651011) internal successors, (32391), 8751 states have internal predecessors, (32391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 32391 transitions. [2022-01-18 06:36:49,176 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 32391 transitions. Word has length 28 [2022-01-18 06:36:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:49,176 INFO L470 AbstractCegarLoop]: Abstraction has 8752 states and 32391 transitions. [2022-01-18 06:36:49,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 32391 transitions. [2022-01-18 06:36:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:49,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:49,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:49,206 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 06:36:49,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:36:49,391 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash 631830218, now seen corresponding path program 28 times [2022-01-18 06:36:49,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:49,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11501013] [2022-01-18 06:36:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:49,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:49,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:49,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11501013] [2022-01-18 06:36:49,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11501013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:49,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2509978] [2022-01-18 06:36:49,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:36:49,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:49,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:49,655 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 06:36:49,656 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 06:36:49,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:36:49,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:49,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:36:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:36:50,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:36:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:50,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:50,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:50,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:50,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,568 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:50,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:50,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:50,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:50,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:50,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2509978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:50,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:50,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:50,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201588904] [2022-01-18 06:36:50,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:50,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:50,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:50,676 INFO L87 Difference]: Start difference. First operand 8752 states and 32391 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:51,114 INFO L93 Difference]: Finished difference Result 11726 states and 42445 transitions. [2022-01-18 06:36:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:36:51,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:51,143 INFO L225 Difference]: With dead ends: 11726 [2022-01-18 06:36:51,143 INFO L226 Difference]: Without dead ends: 11711 [2022-01-18 06:36:51,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:36:51,144 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:51,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 194 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 352 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-01-18 06:36:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11711 states. [2022-01-18 06:36:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11711 to 8792. [2022-01-18 06:36:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8792 states, 8791 states have (on average 3.7001478785121145) internal successors, (32528), 8791 states have internal predecessors, (32528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8792 states to 8792 states and 32528 transitions. [2022-01-18 06:36:51,293 INFO L78 Accepts]: Start accepts. Automaton has 8792 states and 32528 transitions. Word has length 28 [2022-01-18 06:36:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:51,293 INFO L470 AbstractCegarLoop]: Abstraction has 8792 states and 32528 transitions. [2022-01-18 06:36:51,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8792 states and 32528 transitions. [2022-01-18 06:36:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:51,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:51,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:51,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:36:51,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 06:36:51,514 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2104926016, now seen corresponding path program 29 times [2022-01-18 06:36:51,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:51,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269912631] [2022-01-18 06:36:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:51,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:51,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269912631] [2022-01-18 06:36:51,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269912631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:51,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557245382] [2022-01-18 06:36:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:36:51,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:51,726 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 06:36:51,726 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 06:36:51,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:36:51,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:51,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:52,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:36:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:36:52,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:36:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:52,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:52,388 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:52,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:52,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:52,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:52,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,555 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:52,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:52,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557245382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:52,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:52,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:52,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226713630] [2022-01-18 06:36:52,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:52,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:52,692 INFO L87 Difference]: Start difference. First operand 8792 states and 32528 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:53,120 INFO L93 Difference]: Finished difference Result 11857 states and 42825 transitions. [2022-01-18 06:36:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:36:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:53,147 INFO L225 Difference]: With dead ends: 11857 [2022-01-18 06:36:53,148 INFO L226 Difference]: Without dead ends: 11842 [2022-01-18 06:36:53,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:36:53,148 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:53,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 214 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 512 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-01-18 06:36:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11842 states. [2022-01-18 06:36:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11842 to 8817. [2022-01-18 06:36:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 8816 states have (on average 3.698162431941924) internal successors, (32603), 8816 states have internal predecessors, (32603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 32603 transitions. [2022-01-18 06:36:53,312 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 32603 transitions. Word has length 28 [2022-01-18 06:36:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 32603 transitions. [2022-01-18 06:36:53,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 32603 transitions. [2022-01-18 06:36:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:53,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:53,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:53,355 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 06:36:53,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:36:53,547 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1396567798, now seen corresponding path program 30 times [2022-01-18 06:36:53,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:53,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365871694] [2022-01-18 06:36:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:53,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:53,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365871694] [2022-01-18 06:36:53,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365871694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277646383] [2022-01-18 06:36:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:36:53,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:53,808 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 06:36:53,848 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 06:36:53,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:36:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:36:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:54,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:36:54,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:54,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:36:54,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:36:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:54,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:54,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:54,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:36:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,691 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:54,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:54,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:36:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277646383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:54,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:36:54,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452172945] [2022-01-18 06:36:54,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:54,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:36:54,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:36:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:36:54,826 INFO L87 Difference]: Start difference. First operand 8817 states and 32603 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:55,372 INFO L93 Difference]: Finished difference Result 11883 states and 42937 transitions. [2022-01-18 06:36:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:36:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:55,398 INFO L225 Difference]: With dead ends: 11883 [2022-01-18 06:36:55,398 INFO L226 Difference]: Without dead ends: 11844 [2022-01-18 06:36:55,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:36:55,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 107 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:55,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 254 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 672 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-01-18 06:36:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-01-18 06:36:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 8822. [2022-01-18 06:36:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.698900351434078) internal successors, (32628), 8821 states have internal predecessors, (32628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 32628 transitions. [2022-01-18 06:36:55,561 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 32628 transitions. Word has length 28 [2022-01-18 06:36:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:55,561 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 32628 transitions. [2022-01-18 06:36:55,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 32628 transitions. [2022-01-18 06:36:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:55,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:55,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:55,591 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 06:36:55,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 06:36:55,776 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 459271548, now seen corresponding path program 31 times [2022-01-18 06:36:55,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451265163] [2022-01-18 06:36:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:55,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:55,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451265163] [2022-01-18 06:36:55,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451265163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439272616] [2022-01-18 06:36:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:36:55,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:55,986 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 06:36:55,986 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 06:36:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:56,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:36:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:36:56,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:36:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:56,678 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:56,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:56,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:36:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,909 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:56,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:56,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:56,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:56,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:36:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:57,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439272616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:57,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:57,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:36:57,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112267130] [2022-01-18 06:36:57,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:57,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:36:57,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:36:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:36:57,037 INFO L87 Difference]: Start difference. First operand 8822 states and 32628 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:57,606 INFO L93 Difference]: Finished difference Result 11894 states and 42962 transitions. [2022-01-18 06:36:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:36:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:57,633 INFO L225 Difference]: With dead ends: 11894 [2022-01-18 06:36:57,633 INFO L226 Difference]: Without dead ends: 11879 [2022-01-18 06:36:57,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:36:57,633 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:57,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 243 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 538 Invalid, 0 Unknown, 441 Unchecked, 0.3s Time] [2022-01-18 06:36:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2022-01-18 06:36:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 8855. [2022-01-18 06:36:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8855 states, 8854 states have (on average 3.6974248927038627) internal successors, (32737), 8854 states have internal predecessors, (32737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8855 states to 8855 states and 32737 transitions. [2022-01-18 06:36:57,804 INFO L78 Accepts]: Start accepts. Automaton has 8855 states and 32737 transitions. Word has length 28 [2022-01-18 06:36:57,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:36:57,804 INFO L470 AbstractCegarLoop]: Abstraction has 8855 states and 32737 transitions. [2022-01-18 06:36:57,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8855 states and 32737 transitions. [2022-01-18 06:36:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:36:57,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:36:57,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:36:57,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 06:36:58,018 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 06:36:58,019 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:36:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:36:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1167629766, now seen corresponding path program 32 times [2022-01-18 06:36:58,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:36:58,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093143173] [2022-01-18 06:36:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:36:58,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:36:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:36:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:58,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:36:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093143173] [2022-01-18 06:36:58,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093143173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:36:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462799192] [2022-01-18 06:36:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:36:58,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:36:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:36:58,245 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 06:36:58,245 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 06:36:58,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:36:58,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:36:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:36:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:36:58,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:36:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:58,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:36:58,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:36:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:58,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:36:58,829 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:36:58,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:36:58,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:58,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:58,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:36:58,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:58,993 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:36:58,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:36:59,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:36:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:36:59,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:36:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:36:59,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462799192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:36:59,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:36:59,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:36:59,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869470792] [2022-01-18 06:36:59,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:36:59,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:36:59,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:36:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:36:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:36:59,112 INFO L87 Difference]: Start difference. First operand 8855 states and 32737 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:36:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:36:59,944 INFO L93 Difference]: Finished difference Result 12220 states and 43941 transitions. [2022-01-18 06:36:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:36:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:36:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:36:59,981 INFO L225 Difference]: With dead ends: 12220 [2022-01-18 06:36:59,981 INFO L226 Difference]: Without dead ends: 12163 [2022-01-18 06:36:59,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:36:59,982 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:36:59,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 271 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1036 Invalid, 0 Unknown, 332 Unchecked, 0.5s Time] [2022-01-18 06:36:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2022-01-18 06:37:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 8839. [2022-01-18 06:37:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.6989137813985065) internal successors, (32691), 8838 states have internal predecessors, (32691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32691 transitions. [2022-01-18 06:37:00,141 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32691 transitions. Word has length 28 [2022-01-18 06:37:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:00,141 INFO L470 AbstractCegarLoop]: Abstraction has 8839 states and 32691 transitions. [2022-01-18 06:37:00,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32691 transitions. [2022-01-18 06:37:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:00,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:00,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:00,208 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 06:37:00,393 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 06:37:00,394 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash -730861046, now seen corresponding path program 33 times [2022-01-18 06:37:00,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:00,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983693373] [2022-01-18 06:37:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:00,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:00,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983693373] [2022-01-18 06:37:00,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983693373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256170524] [2022-01-18 06:37:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:37:00,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:00,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:00,668 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 06:37:00,693 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 06:37:00,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:37:00,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:37:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:00,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:01,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:01,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2022-01-18 06:37:01,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 69 [2022-01-18 06:37:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:01,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:01,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2022-01-18 06:37:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:02,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:02,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:02,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:02,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:02,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2022-01-18 06:37:03,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:03,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 74 [2022-01-18 06:37:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256170524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:03,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:03,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-01-18 06:37:03,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051356159] [2022-01-18 06:37:03,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:37:03,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:37:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:37:03,566 INFO L87 Difference]: Start difference. First operand 8839 states and 32691 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:06,184 INFO L93 Difference]: Finished difference Result 16943 states and 59870 transitions. [2022-01-18 06:37:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:37:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:06,228 INFO L225 Difference]: With dead ends: 16943 [2022-01-18 06:37:06,228 INFO L226 Difference]: Without dead ends: 16929 [2022-01-18 06:37:06,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=985, Invalid=5021, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:37:06,229 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2571 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:06,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 538 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 540 Invalid, 0 Unknown, 2571 Unchecked, 0.3s Time] [2022-01-18 06:37:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16929 states. [2022-01-18 06:37:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16929 to 8966. [2022-01-18 06:37:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 8965 states have (on average 3.6847741215839376) internal successors, (33034), 8965 states have internal predecessors, (33034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 33034 transitions. [2022-01-18 06:37:06,437 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 33034 transitions. Word has length 28 [2022-01-18 06:37:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:06,437 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 33034 transitions. [2022-01-18 06:37:06,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 33034 transitions. [2022-01-18 06:37:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:06,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:06,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:06,469 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 06:37:06,655 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 06:37:06,655 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash -633137262, now seen corresponding path program 34 times [2022-01-18 06:37:06,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:06,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376478588] [2022-01-18 06:37:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:06,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:06,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376478588] [2022-01-18 06:37:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376478588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963280573] [2022-01-18 06:37:06,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:37:06,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:06,907 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 06:37:06,908 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 06:37:06,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:37:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:07,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:07,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:37:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:07,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:37:07,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:07,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:07,484 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:07,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:07,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,649 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:07,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:07,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:07,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:07,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963280573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:07,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:07,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:07,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409777471] [2022-01-18 06:37:07,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:07,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:07,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:07,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:07,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:07,773 INFO L87 Difference]: Start difference. First operand 8966 states and 33034 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:08,385 INFO L93 Difference]: Finished difference Result 13399 states and 47952 transitions. [2022-01-18 06:37:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:37:08,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:08,416 INFO L225 Difference]: With dead ends: 13399 [2022-01-18 06:37:08,417 INFO L226 Difference]: Without dead ends: 13384 [2022-01-18 06:37:08,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:37:08,417 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 291 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 572 Invalid, 0 Unknown, 492 Unchecked, 0.3s Time] [2022-01-18 06:37:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2022-01-18 06:37:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 9007. [2022-01-18 06:37:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9007 states, 9006 states have (on average 3.681545636242505) internal successors, (33156), 9006 states have internal predecessors, (33156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9007 states to 9007 states and 33156 transitions. [2022-01-18 06:37:08,602 INFO L78 Accepts]: Start accepts. Automaton has 9007 states and 33156 transitions. Word has length 28 [2022-01-18 06:37:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:08,602 INFO L470 AbstractCegarLoop]: Abstraction has 9007 states and 33156 transitions. [2022-01-18 06:37:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 9007 states and 33156 transitions. [2022-01-18 06:37:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:08,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:08,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:08,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:37:08,818 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 06:37:08,818 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2015332598, now seen corresponding path program 35 times [2022-01-18 06:37:08,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:08,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848946870] [2022-01-18 06:37:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:08,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:09,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848946870] [2022-01-18 06:37:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848946870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:09,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65517629] [2022-01-18 06:37:09,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:37:09,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:09,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:09,073 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 06:37:09,074 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 06:37:09,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:37:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:09,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:09,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:09,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:37:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:09,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:09,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:09,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:09,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:09,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:09,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,906 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:09,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:09,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:10,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65517629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:10,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:10,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:10,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066027806] [2022-01-18 06:37:10,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:10,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:10,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:10,021 INFO L87 Difference]: Start difference. First operand 9007 states and 33156 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:10,658 INFO L93 Difference]: Finished difference Result 13221 states and 47328 transitions. [2022-01-18 06:37:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 06:37:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:10,686 INFO L225 Difference]: With dead ends: 13221 [2022-01-18 06:37:10,687 INFO L226 Difference]: Without dead ends: 13187 [2022-01-18 06:37:10,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:37:10,687 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:10,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 657 Invalid, 0 Unknown, 435 Unchecked, 0.3s Time] [2022-01-18 06:37:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13187 states. [2022-01-18 06:37:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13187 to 8999. [2022-01-18 06:37:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8999 states, 8998 states have (on average 3.6830406757057124) internal successors, (33140), 8998 states have internal predecessors, (33140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8999 states to 8999 states and 33140 transitions. [2022-01-18 06:37:10,856 INFO L78 Accepts]: Start accepts. Automaton has 8999 states and 33140 transitions. Word has length 28 [2022-01-18 06:37:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 8999 states and 33140 transitions. [2022-01-18 06:37:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8999 states and 33140 transitions. [2022-01-18 06:37:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:10,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:10,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:10,886 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 06:37:11,071 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 06:37:11,072 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1227555526, now seen corresponding path program 36 times [2022-01-18 06:37:11,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155001985] [2022-01-18 06:37:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:11,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:11,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155001985] [2022-01-18 06:37:11,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155001985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:11,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081225992] [2022-01-18 06:37:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:37:11,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:11,309 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 06:37:11,310 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 06:37:11,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:37:11,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:11,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:37:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:11,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:11,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:37:11,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:37:11,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 06:37:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:11,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:11,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:11,948 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:11,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:12,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:12,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:12,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:12,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:12,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-01-18 06:37:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:12,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081225992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:12,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:12,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:37:12,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765437283] [2022-01-18 06:37:12,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:12,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:37:12,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:37:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:37:12,284 INFO L87 Difference]: Start difference. First operand 8999 states and 33140 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:15,286 INFO L93 Difference]: Finished difference Result 13903 states and 48779 transitions. [2022-01-18 06:37:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:37:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:15,318 INFO L225 Difference]: With dead ends: 13903 [2022-01-18 06:37:15,318 INFO L226 Difference]: Without dead ends: 13889 [2022-01-18 06:37:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=765, Invalid=6375, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 06:37:15,320 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 255 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:15,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 514 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1161 Invalid, 0 Unknown, 867 Unchecked, 0.6s Time] [2022-01-18 06:37:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-01-18 06:37:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 9127. [2022-01-18 06:37:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 3.6725838264299804) internal successors, (33516), 9126 states have internal predecessors, (33516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 33516 transitions. [2022-01-18 06:37:15,517 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 33516 transitions. Word has length 28 [2022-01-18 06:37:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 9127 states and 33516 transitions. [2022-01-18 06:37:15,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 33516 transitions. [2022-01-18 06:37:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:15,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:15,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:15,548 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 06:37:15,733 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 06:37:15,733 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash 823881094, now seen corresponding path program 37 times [2022-01-18 06:37:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514771797] [2022-01-18 06:37:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:15,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:15,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514771797] [2022-01-18 06:37:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514771797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884121224] [2022-01-18 06:37:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:37:15,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:15,952 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 06:37:15,953 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 06:37:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:16,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:16,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:37:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:16,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:37:16,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:37:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:16,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:16,546 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:16,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:16,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:16,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:37:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,702 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:16,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:16,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:16,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884121224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:16,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:16,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:16,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817884911] [2022-01-18 06:37:16,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:16,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:16,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:16,812 INFO L87 Difference]: Start difference. First operand 9127 states and 33516 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:17,527 INFO L93 Difference]: Finished difference Result 13322 states and 47695 transitions. [2022-01-18 06:37:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:37:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:17,560 INFO L225 Difference]: With dead ends: 13322 [2022-01-18 06:37:17,560 INFO L226 Difference]: Without dead ends: 13319 [2022-01-18 06:37:17,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:37:17,560 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:17,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 328 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 675 Invalid, 0 Unknown, 590 Unchecked, 0.3s Time] [2022-01-18 06:37:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13319 states. [2022-01-18 06:37:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13319 to 9129. [2022-01-18 06:37:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 9128 states have (on average 3.673751095530237) internal successors, (33534), 9128 states have internal predecessors, (33534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 33534 transitions. [2022-01-18 06:37:17,797 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 33534 transitions. Word has length 28 [2022-01-18 06:37:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:17,797 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 33534 transitions. [2022-01-18 06:37:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 33534 transitions. [2022-01-18 06:37:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:17,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:17,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:17,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 06:37:18,012 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 06:37:18,013 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash 865506314, now seen corresponding path program 38 times [2022-01-18 06:37:18,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:18,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513180030] [2022-01-18 06:37:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:18,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:18,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:18,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513180030] [2022-01-18 06:37:18,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513180030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968718825] [2022-01-18 06:37:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:37:18,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:18,216 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 06:37:18,216 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 06:37:18,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:37:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:18,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:18,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:18,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:18,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:37:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:18,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:18,768 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:18,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:18,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:18,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:37:18,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,907 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:18,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:18,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:19,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968718825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:19,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:19,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:19,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640463974] [2022-01-18 06:37:19,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:19,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:19,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:19,032 INFO L87 Difference]: Start difference. First operand 9129 states and 33534 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:19,709 INFO L93 Difference]: Finished difference Result 13328 states and 47713 transitions. [2022-01-18 06:37:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:37:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:19,738 INFO L225 Difference]: With dead ends: 13328 [2022-01-18 06:37:19,738 INFO L226 Difference]: Without dead ends: 13313 [2022-01-18 06:37:19,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:37:19,739 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:19,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 351 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 609 Invalid, 0 Unknown, 463 Unchecked, 0.3s Time] [2022-01-18 06:37:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13313 states. [2022-01-18 06:37:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13313 to 9111. [2022-01-18 06:37:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 3.675740944017563) internal successors, (33486), 9110 states have internal predecessors, (33486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 33486 transitions. [2022-01-18 06:37:19,922 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 33486 transitions. Word has length 28 [2022-01-18 06:37:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:19,922 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 33486 transitions. [2022-01-18 06:37:19,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 33486 transitions. [2022-01-18 06:37:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:19,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:19,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:19,952 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 06:37:20,137 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 06:37:20,138 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 20287918, now seen corresponding path program 39 times [2022-01-18 06:37:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806574505] [2022-01-18 06:37:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:20,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:20,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806574505] [2022-01-18 06:37:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806574505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:20,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303937794] [2022-01-18 06:37:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:37:20,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:20,349 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 06:37:20,350 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 06:37:20,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:37:20,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:20,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:37:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:20,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:20,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:37:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:20,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:20,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2022-01-18 06:37:21,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:21,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 72 [2022-01-18 06:37:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:21,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:21,766 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:37:21,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 79 [2022-01-18 06:37:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:22,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:22,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:22,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-01-18 06:37:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:22,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303937794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:22,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:22,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:37:22,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293935784] [2022-01-18 06:37:22,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:22,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:37:22,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:37:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:37:22,460 INFO L87 Difference]: Start difference. First operand 9111 states and 33486 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:24,187 INFO L93 Difference]: Finished difference Result 13805 states and 49324 transitions. [2022-01-18 06:37:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:37:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:24,217 INFO L225 Difference]: With dead ends: 13805 [2022-01-18 06:37:24,218 INFO L226 Difference]: Without dead ends: 13791 [2022-01-18 06:37:24,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=613, Invalid=3547, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:37:24,219 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 376 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 594 Invalid, 0 Unknown, 757 Unchecked, 0.3s Time] [2022-01-18 06:37:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13791 states. [2022-01-18 06:37:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13791 to 9174. [2022-01-18 06:37:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9174 states, 9173 states have (on average 3.67011882699226) internal successors, (33666), 9173 states have internal predecessors, (33666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9174 states to 9174 states and 33666 transitions. [2022-01-18 06:37:24,390 INFO L78 Accepts]: Start accepts. Automaton has 9174 states and 33666 transitions. Word has length 28 [2022-01-18 06:37:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:24,390 INFO L470 AbstractCegarLoop]: Abstraction has 9174 states and 33666 transitions. [2022-01-18 06:37:24,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9174 states and 33666 transitions. [2022-01-18 06:37:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:24,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:24,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:24,420 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 06:37:24,604 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 06:37:24,605 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2141582734, now seen corresponding path program 40 times [2022-01-18 06:37:24,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:24,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993179138] [2022-01-18 06:37:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:24,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:24,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993179138] [2022-01-18 06:37:24,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993179138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369849973] [2022-01-18 06:37:24,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:37:24,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:24,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:24,857 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 06:37:24,858 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 06:37:24,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:37:24,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:25,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:25,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:37:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:25,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:25,449 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:25,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:25,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:25,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,607 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:25,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:25,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:25,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369849973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:25,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:25,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985531665] [2022-01-18 06:37:25,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:25,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:25,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:25,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:25,723 INFO L87 Difference]: Start difference. First operand 9174 states and 33666 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:26,390 INFO L93 Difference]: Finished difference Result 12418 states and 44477 transitions. [2022-01-18 06:37:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:37:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:26,419 INFO L225 Difference]: With dead ends: 12418 [2022-01-18 06:37:26,419 INFO L226 Difference]: Without dead ends: 12403 [2022-01-18 06:37:26,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:37:26,420 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:26,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 238 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 815 Invalid, 0 Unknown, 250 Unchecked, 0.4s Time] [2022-01-18 06:37:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12403 states. [2022-01-18 06:37:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12403 to 9094. [2022-01-18 06:37:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9094 states, 9093 states have (on average 3.6804135048938744) internal successors, (33466), 9093 states have internal predecessors, (33466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9094 states to 9094 states and 33466 transitions. [2022-01-18 06:37:26,588 INFO L78 Accepts]: Start accepts. Automaton has 9094 states and 33466 transitions. Word has length 28 [2022-01-18 06:37:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:26,588 INFO L470 AbstractCegarLoop]: Abstraction has 9094 states and 33466 transitions. [2022-01-18 06:37:26,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9094 states and 33466 transitions. [2022-01-18 06:37:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:26,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:26,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:26,620 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 06:37:26,804 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 06:37:26,805 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -887489994, now seen corresponding path program 41 times [2022-01-18 06:37:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780773806] [2022-01-18 06:37:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:26,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:27,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780773806] [2022-01-18 06:37:27,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780773806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:27,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123974740] [2022-01-18 06:37:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:37:27,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:27,021 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 06:37:27,022 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 06:37:27,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:37:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:27,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:27,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:27,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:37:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:27,585 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:27,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:27,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:27,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,753 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:27,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:27,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:27,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123974740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:27,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:27,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:27,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726857363] [2022-01-18 06:37:27,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:27,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:27,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:27,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:27,875 INFO L87 Difference]: Start difference. First operand 9094 states and 33466 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:28,480 INFO L93 Difference]: Finished difference Result 13252 states and 47549 transitions. [2022-01-18 06:37:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:37:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:28,510 INFO L225 Difference]: With dead ends: 13252 [2022-01-18 06:37:28,510 INFO L226 Difference]: Without dead ends: 13245 [2022-01-18 06:37:28,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:37:28,511 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 125 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:28,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 261 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 650 Invalid, 0 Unknown, 403 Unchecked, 0.3s Time] [2022-01-18 06:37:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2022-01-18 06:37:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 9097. [2022-01-18 06:37:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9097 states, 9096 states have (on average 3.680079155672823) internal successors, (33474), 9096 states have internal predecessors, (33474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9097 states to 9097 states and 33474 transitions. [2022-01-18 06:37:28,743 INFO L78 Accepts]: Start accepts. Automaton has 9097 states and 33474 transitions. Word has length 28 [2022-01-18 06:37:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:28,743 INFO L470 AbstractCegarLoop]: Abstraction has 9097 states and 33474 transitions. [2022-01-18 06:37:28,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 9097 states and 33474 transitions. [2022-01-18 06:37:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:28,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:28,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:28,773 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 06:37:28,958 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 06:37:28,958 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1524168138, now seen corresponding path program 42 times [2022-01-18 06:37:28,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293225291] [2022-01-18 06:37:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:28,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:29,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293225291] [2022-01-18 06:37:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293225291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:29,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472332660] [2022-01-18 06:37:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:37:29,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:29,207 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 06:37:29,208 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 06:37:29,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:37:29,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:29,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:29,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:29,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:29,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:29,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:29,789 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:29,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:29,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:29,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:29,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:29,945 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:29,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:30,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:30,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:30,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:30,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:30,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472332660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:30,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:30,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:30,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286331991] [2022-01-18 06:37:30,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:30,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:30,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:30,081 INFO L87 Difference]: Start difference. First operand 9097 states and 33474 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:30,585 INFO L93 Difference]: Finished difference Result 12469 states and 44728 transitions. [2022-01-18 06:37:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:37:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:30,615 INFO L225 Difference]: With dead ends: 12469 [2022-01-18 06:37:30,615 INFO L226 Difference]: Without dead ends: 12454 [2022-01-18 06:37:30,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:37:30,616 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:30,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 213 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 419 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-01-18 06:37:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12454 states. [2022-01-18 06:37:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12454 to 9172. [2022-01-18 06:37:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9172 states, 9171 states have (on average 3.6757169338131064) internal successors, (33710), 9171 states have internal predecessors, (33710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9172 states to 9172 states and 33710 transitions. [2022-01-18 06:37:30,778 INFO L78 Accepts]: Start accepts. Automaton has 9172 states and 33710 transitions. Word has length 28 [2022-01-18 06:37:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:30,779 INFO L470 AbstractCegarLoop]: Abstraction has 9172 states and 33710 transitions. [2022-01-18 06:37:30,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:30,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9172 states and 33710 transitions. [2022-01-18 06:37:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:30,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:30,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:30,809 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 06:37:30,994 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 06:37:30,995 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1273862414, now seen corresponding path program 43 times [2022-01-18 06:37:30,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:30,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597008442] [2022-01-18 06:37:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:30,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:31,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597008442] [2022-01-18 06:37:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597008442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531458567] [2022-01-18 06:37:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:37:31,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:31,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:31,225 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 06:37:31,226 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 06:37:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:31,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:31,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:31,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:31,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:31,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:31,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:31,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:31,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:31,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,933 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:31,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:32,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531458567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:32,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528691256] [2022-01-18 06:37:32,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:32,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:32,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:32,056 INFO L87 Difference]: Start difference. First operand 9172 states and 33710 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:32,536 INFO L93 Difference]: Finished difference Result 12408 states and 44563 transitions. [2022-01-18 06:37:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:37:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:32,564 INFO L225 Difference]: With dead ends: 12408 [2022-01-18 06:37:32,564 INFO L226 Difference]: Without dead ends: 12393 [2022-01-18 06:37:32,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:37:32,565 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:32,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 204 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 656 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-01-18 06:37:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12393 states. [2022-01-18 06:37:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12393 to 9193. [2022-01-18 06:37:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.675587467362924) internal successors, (33786), 9192 states have internal predecessors, (33786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33786 transitions. [2022-01-18 06:37:32,802 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33786 transitions. Word has length 28 [2022-01-18 06:37:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:32,802 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33786 transitions. [2022-01-18 06:37:32,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33786 transitions. [2022-01-18 06:37:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:32,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:32,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:32,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 06:37:33,016 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 06:37:33,016 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1478357238, now seen corresponding path program 44 times [2022-01-18 06:37:33,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:33,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696716035] [2022-01-18 06:37:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:33,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:33,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696716035] [2022-01-18 06:37:33,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696716035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527462139] [2022-01-18 06:37:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:37:33,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:33,222 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 06:37:33,223 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 06:37:33,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:37:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:33,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:33,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:33,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:33,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:33,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:33,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:37:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:33,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:33,758 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:33,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:33,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:33,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,905 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:33,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:33,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:33,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:34,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527462139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:34,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:34,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:34,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262898712] [2022-01-18 06:37:34,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:34,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:34,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:34,012 INFO L87 Difference]: Start difference. First operand 9193 states and 33786 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:34,630 INFO L93 Difference]: Finished difference Result 13437 states and 48057 transitions. [2022-01-18 06:37:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 06:37:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:34,662 INFO L225 Difference]: With dead ends: 13437 [2022-01-18 06:37:34,663 INFO L226 Difference]: Without dead ends: 13403 [2022-01-18 06:37:34,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:37:34,668 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 191 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:34,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 224 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 589 Invalid, 0 Unknown, 500 Unchecked, 0.3s Time] [2022-01-18 06:37:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13403 states. [2022-01-18 06:37:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13403 to 9206. [2022-01-18 06:37:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 3.6744160782183597) internal successors, (33823), 9205 states have internal predecessors, (33823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 33823 transitions. [2022-01-18 06:37:34,864 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 33823 transitions. Word has length 28 [2022-01-18 06:37:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:34,864 INFO L470 AbstractCegarLoop]: Abstraction has 9206 states and 33823 transitions. [2022-01-18 06:37:34,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 33823 transitions. [2022-01-18 06:37:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:34,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:34,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:34,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:37:35,082 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 06:37:35,082 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1764530886, now seen corresponding path program 45 times [2022-01-18 06:37:35,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912111886] [2022-01-18 06:37:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:35,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:35,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:35,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912111886] [2022-01-18 06:37:35,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912111886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:35,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574439564] [2022-01-18 06:37:35,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:37:35,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:35,312 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 06:37:35,313 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 06:37:35,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:37:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:35,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:35,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:35,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:35,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:35,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:35,880 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:35,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:35,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:35,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:35,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:36,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:36,052 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:36,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:36,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:36,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:36,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574439564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:36,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:36,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:36,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33110890] [2022-01-18 06:37:36,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:36,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:36,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:36,174 INFO L87 Difference]: Start difference. First operand 9206 states and 33823 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:36,814 INFO L93 Difference]: Finished difference Result 12508 states and 44818 transitions. [2022-01-18 06:37:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:37:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:36,849 INFO L225 Difference]: With dead ends: 12508 [2022-01-18 06:37:36,850 INFO L226 Difference]: Without dead ends: 12493 [2022-01-18 06:37:36,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:37:36,850 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:36,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 230 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 742 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-18 06:37:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2022-01-18 06:37:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 9248. [2022-01-18 06:37:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9248 states, 9247 states have (on average 3.6707040121120365) internal successors, (33943), 9247 states have internal predecessors, (33943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9248 states to 9248 states and 33943 transitions. [2022-01-18 06:37:37,057 INFO L78 Accepts]: Start accepts. Automaton has 9248 states and 33943 transitions. Word has length 28 [2022-01-18 06:37:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:37,057 INFO L470 AbstractCegarLoop]: Abstraction has 9248 states and 33943 transitions. [2022-01-18 06:37:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9248 states and 33943 transitions. [2022-01-18 06:37:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:37,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:37,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:37,091 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 06:37:37,275 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 06:37:37,276 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash -566926770, now seen corresponding path program 46 times [2022-01-18 06:37:37,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:37,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092432376] [2022-01-18 06:37:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:37,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:37,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092432376] [2022-01-18 06:37:37,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092432376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673965552] [2022-01-18 06:37:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:37:37,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:37,497 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 06:37:37,498 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 06:37:37,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:37:37,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:37,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:37,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:37,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:37,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:38,077 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:38,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:38,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:38,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:38,217 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:38,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:38,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:38,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673965552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:38,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:38,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:38,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622372143] [2022-01-18 06:37:38,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:38,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:38,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:38,332 INFO L87 Difference]: Start difference. First operand 9248 states and 33943 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:38,995 INFO L93 Difference]: Finished difference Result 13515 states and 48265 transitions. [2022-01-18 06:37:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 06:37:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:39,027 INFO L225 Difference]: With dead ends: 13515 [2022-01-18 06:37:39,028 INFO L226 Difference]: Without dead ends: 13481 [2022-01-18 06:37:39,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:37:39,028 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 169 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:39,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 222 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 686 Invalid, 0 Unknown, 406 Unchecked, 0.3s Time] [2022-01-18 06:37:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13481 states. [2022-01-18 06:37:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13481 to 9257. [2022-01-18 06:37:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 3.6697277441659466) internal successors, (33967), 9256 states have internal predecessors, (33967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 33967 transitions. [2022-01-18 06:37:39,208 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 33967 transitions. Word has length 28 [2022-01-18 06:37:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:39,208 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 33967 transitions. [2022-01-18 06:37:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 33967 transitions. [2022-01-18 06:37:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:39,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:39,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:39,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 06:37:39,424 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 06:37:39,425 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1619005942, now seen corresponding path program 47 times [2022-01-18 06:37:39,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083613401] [2022-01-18 06:37:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:39,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:39,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083613401] [2022-01-18 06:37:39,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083613401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101902246] [2022-01-18 06:37:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:37:39,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:39,660 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 06:37:39,684 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 06:37:39,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:37:39,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:39,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:40,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:40,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:40,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:40,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:40,338 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:40,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:40,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:40,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,471 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:40,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:40,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:40,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101902246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:40,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:40,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:40,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438129486] [2022-01-18 06:37:40,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:40,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:40,580 INFO L87 Difference]: Start difference. First operand 9257 states and 33967 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:41,177 INFO L93 Difference]: Finished difference Result 12480 states and 44746 transitions. [2022-01-18 06:37:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:37:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:41,205 INFO L225 Difference]: With dead ends: 12480 [2022-01-18 06:37:41,206 INFO L226 Difference]: Without dead ends: 12465 [2022-01-18 06:37:41,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:37:41,206 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:41,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 249 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 711 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-01-18 06:37:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2022-01-18 06:37:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 9233. [2022-01-18 06:37:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9233 states, 9232 states have (on average 3.6721187175043326) internal successors, (33901), 9232 states have internal predecessors, (33901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9233 states to 9233 states and 33901 transitions. [2022-01-18 06:37:41,411 INFO L78 Accepts]: Start accepts. Automaton has 9233 states and 33901 transitions. Word has length 28 [2022-01-18 06:37:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:41,411 INFO L470 AbstractCegarLoop]: Abstraction has 9233 states and 33901 transitions. [2022-01-18 06:37:41,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9233 states and 33901 transitions. [2022-01-18 06:37:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:41,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:41,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:41,442 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 06:37:41,626 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 06:37:41,627 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash -358633462, now seen corresponding path program 48 times [2022-01-18 06:37:41,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:41,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857666955] [2022-01-18 06:37:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:41,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:41,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857666955] [2022-01-18 06:37:41,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857666955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198464346] [2022-01-18 06:37:41,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:37:41,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:41,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:41,829 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 06:37:41,829 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 06:37:41,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:37:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:41,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 06:37:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:42,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:42,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:42,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:37:42,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:42,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 39 [2022-01-18 06:37:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:42,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:42,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:37:42,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 53 [2022-01-18 06:37:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:42,975 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:42,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:43,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:43,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198464346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:43,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:43,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:37:43,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874520325] [2022-01-18 06:37:43,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:43,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:37:43,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:37:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:37:43,105 INFO L87 Difference]: Start difference. First operand 9233 states and 33901 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:45,372 INFO L93 Difference]: Finished difference Result 17577 states and 61761 transitions. [2022-01-18 06:37:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 06:37:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:45,410 INFO L225 Difference]: With dead ends: 17577 [2022-01-18 06:37:45,411 INFO L226 Difference]: Without dead ends: 17521 [2022-01-18 06:37:45,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=655, Invalid=3505, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:37:45,411 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 291 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1575 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:45,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 535 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 904 Invalid, 0 Unknown, 1575 Unchecked, 0.4s Time] [2022-01-18 06:37:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17521 states. [2022-01-18 06:37:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17521 to 9214. [2022-01-18 06:37:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9214 states, 9213 states have (on average 3.6755671333984585) internal successors, (33863), 9213 states have internal predecessors, (33863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9214 states to 9214 states and 33863 transitions. [2022-01-18 06:37:45,598 INFO L78 Accepts]: Start accepts. Automaton has 9214 states and 33863 transitions. Word has length 28 [2022-01-18 06:37:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:45,599 INFO L470 AbstractCegarLoop]: Abstraction has 9214 states and 33863 transitions. [2022-01-18 06:37:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9214 states and 33863 transitions. [2022-01-18 06:37:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:45,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:45,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:45,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 06:37:45,813 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 06:37:45,814 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash 557263278, now seen corresponding path program 49 times [2022-01-18 06:37:45,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324518624] [2022-01-18 06:37:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:45,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:46,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324518624] [2022-01-18 06:37:46,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324518624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:46,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765910269] [2022-01-18 06:37:46,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:37:46,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:46,097 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 06:37:46,120 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 06:37:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:46,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:46,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:46,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:37:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:46,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:46,690 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:46,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:46,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:46,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:46,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,830 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:46,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:46,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:46,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:46,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765910269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:46,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:46,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:46,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727940163] [2022-01-18 06:37:46,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:46,945 INFO L87 Difference]: Start difference. First operand 9214 states and 33863 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:47,558 INFO L93 Difference]: Finished difference Result 12459 states and 44686 transitions. [2022-01-18 06:37:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:37:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:47,585 INFO L225 Difference]: With dead ends: 12459 [2022-01-18 06:37:47,585 INFO L226 Difference]: Without dead ends: 12444 [2022-01-18 06:37:47,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:37:47,585 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:47,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 866 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2022-01-18 06:37:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2022-01-18 06:37:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 9212. [2022-01-18 06:37:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9212 states, 9211 states have (on average 3.675605254586907) internal successors, (33856), 9211 states have internal predecessors, (33856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9212 states to 9212 states and 33856 transitions. [2022-01-18 06:37:47,737 INFO L78 Accepts]: Start accepts. Automaton has 9212 states and 33856 transitions. Word has length 28 [2022-01-18 06:37:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 9212 states and 33856 transitions. [2022-01-18 06:37:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9212 states and 33856 transitions. [2022-01-18 06:37:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:47,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:47,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:47,767 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 06:37:47,952 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 06:37:47,952 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash -844598138, now seen corresponding path program 50 times [2022-01-18 06:37:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750118240] [2022-01-18 06:37:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:47,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:48,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750118240] [2022-01-18 06:37:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750118240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:48,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066427143] [2022-01-18 06:37:48,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:37:48,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:48,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:48,200 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 06:37:48,201 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 06:37:48,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:37:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:48,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:48,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:48,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:48,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:48,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:48,976 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:48,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:49,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:49,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:37:49,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:49,132 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:49,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:49,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:49,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:49,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066427143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:49,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287284881] [2022-01-18 06:37:49,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:49,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:49,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:49,262 INFO L87 Difference]: Start difference. First operand 9212 states and 33856 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:50,010 INFO L93 Difference]: Finished difference Result 12859 states and 45822 transitions. [2022-01-18 06:37:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:37:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:50,038 INFO L225 Difference]: With dead ends: 12859 [2022-01-18 06:37:50,038 INFO L226 Difference]: Without dead ends: 12835 [2022-01-18 06:37:50,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:37:50,038 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:50,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 220 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 659 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-01-18 06:37:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-01-18 06:37:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 9173. [2022-01-18 06:37:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9173 states, 9172 states have (on average 3.6788050588748367) internal successors, (33742), 9172 states have internal predecessors, (33742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9173 states to 9173 states and 33742 transitions. [2022-01-18 06:37:50,201 INFO L78 Accepts]: Start accepts. Automaton has 9173 states and 33742 transitions. Word has length 28 [2022-01-18 06:37:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 9173 states and 33742 transitions. [2022-01-18 06:37:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 9173 states and 33742 transitions. [2022-01-18 06:37:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:50,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:50,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:50,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 06:37:50,417 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 06:37:50,417 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1324401978, now seen corresponding path program 51 times [2022-01-18 06:37:50,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:50,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179951773] [2022-01-18 06:37:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:50,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:50,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:50,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179951773] [2022-01-18 06:37:50,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179951773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:50,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417663077] [2022-01-18 06:37:50,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:37:50,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:50,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:50,660 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 06:37:50,661 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 06:37:50,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:37:50,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:50,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:37:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:51,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:37:51,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:37:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:51,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:51,298 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:51,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:37:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:37:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,439 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:51,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:51,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:51,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:37:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417663077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:51,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:51,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:37:51,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867175000] [2022-01-18 06:37:51,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:37:51,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:37:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:37:51,571 INFO L87 Difference]: Start difference. First operand 9173 states and 33742 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:52,203 INFO L93 Difference]: Finished difference Result 13377 states and 47974 transitions. [2022-01-18 06:37:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:37:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:52,232 INFO L225 Difference]: With dead ends: 13377 [2022-01-18 06:37:52,232 INFO L226 Difference]: Without dead ends: 13370 [2022-01-18 06:37:52,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:37:52,233 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:52,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 265 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 705 Invalid, 0 Unknown, 268 Unchecked, 0.3s Time] [2022-01-18 06:37:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13370 states. [2022-01-18 06:37:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13370 to 9171. [2022-01-18 06:37:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9171 states, 9170 states have (on average 3.678516902944384) internal successors, (33732), 9170 states have internal predecessors, (33732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9171 states to 9171 states and 33732 transitions. [2022-01-18 06:37:52,408 INFO L78 Accepts]: Start accepts. Automaton has 9171 states and 33732 transitions. Word has length 28 [2022-01-18 06:37:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:52,408 INFO L470 AbstractCegarLoop]: Abstraction has 9171 states and 33732 transitions. [2022-01-18 06:37:52,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9171 states and 33732 transitions. [2022-01-18 06:37:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:52,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:52,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:52,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 06:37:52,622 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 06:37:52,622 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 354999818, now seen corresponding path program 52 times [2022-01-18 06:37:52,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378204193] [2022-01-18 06:37:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:52,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:52,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378204193] [2022-01-18 06:37:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378204193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307300704] [2022-01-18 06:37:52,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:37:52,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:52,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:52,823 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 06:37:52,824 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 06:37:52,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:37:52,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:53,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:53,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:37:53,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:53,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:53,435 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:53,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:37:53,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:53,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:37:53,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,562 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:53,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:53,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:53,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:53,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307300704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:53,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:53,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:53,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180210729] [2022-01-18 06:37:53,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:53,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:53,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:53,724 INFO L87 Difference]: Start difference. First operand 9171 states and 33732 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:54,654 INFO L93 Difference]: Finished difference Result 12482 states and 44736 transitions. [2022-01-18 06:37:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:37:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:54,680 INFO L225 Difference]: With dead ends: 12482 [2022-01-18 06:37:54,680 INFO L226 Difference]: Without dead ends: 12457 [2022-01-18 06:37:54,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:37:54,681 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 125 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:54,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 320 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 905 Invalid, 0 Unknown, 323 Unchecked, 0.4s Time] [2022-01-18 06:37:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2022-01-18 06:37:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 9292. [2022-01-18 06:37:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 3.669465073727263) internal successors, (34093), 9291 states have internal predecessors, (34093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 34093 transitions. [2022-01-18 06:37:54,839 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 34093 transitions. Word has length 28 [2022-01-18 06:37:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:54,839 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 34093 transitions. [2022-01-18 06:37:54,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 34093 transitions. [2022-01-18 06:37:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:54,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:54,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:54,869 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 06:37:55,054 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 06:37:55,054 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1702130574, now seen corresponding path program 53 times [2022-01-18 06:37:55,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:55,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448773223] [2022-01-18 06:37:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:55,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:55,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448773223] [2022-01-18 06:37:55,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448773223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:55,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781163160] [2022-01-18 06:37:55,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:37:55,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:55,325 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 06:37:55,326 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 06:37:55,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:37:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:55,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:55,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:37:55,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:37:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:56,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:56,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:37:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:56,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:56,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:37:56,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:56,226 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:56,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:56,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:56,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:56,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:56,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781163160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:56,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:56,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:56,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413587915] [2022-01-18 06:37:56,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:56,344 INFO L87 Difference]: Start difference. First operand 9292 states and 34093 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:37:57,174 INFO L93 Difference]: Finished difference Result 12589 states and 45041 transitions. [2022-01-18 06:37:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:37:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:37:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:37:57,201 INFO L225 Difference]: With dead ends: 12589 [2022-01-18 06:37:57,201 INFO L226 Difference]: Without dead ends: 12586 [2022-01-18 06:37:57,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:37:57,202 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:37:57,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 354 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 831 Invalid, 0 Unknown, 305 Unchecked, 0.4s Time] [2022-01-18 06:37:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2022-01-18 06:37:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 9334. [2022-01-18 06:37:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9334 states, 9333 states have (on average 3.6664523732990464) internal successors, (34219), 9333 states have internal predecessors, (34219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9334 states to 9334 states and 34219 transitions. [2022-01-18 06:37:57,369 INFO L78 Accepts]: Start accepts. Automaton has 9334 states and 34219 transitions. Word has length 28 [2022-01-18 06:37:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:37:57,369 INFO L470 AbstractCegarLoop]: Abstraction has 9334 states and 34219 transitions. [2022-01-18 06:37:57,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:37:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9334 states and 34219 transitions. [2022-01-18 06:37:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:37:57,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:37:57,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:37:57,400 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 06:37:57,585 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 06:37:57,585 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:37:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:37:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1584538738, now seen corresponding path program 54 times [2022-01-18 06:37:57,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:37:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233784361] [2022-01-18 06:37:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:37:57,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:37:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:37:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:57,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:37:57,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233784361] [2022-01-18 06:37:57,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233784361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:37:57,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706365280] [2022-01-18 06:37:57,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:37:57,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:37:57,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:37:57,824 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 06:37:57,844 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 06:37:57,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:37:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:37:57,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:37:57,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:37:58,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:37:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:37:58,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:37:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:58,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:37:58,514 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:37:58,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:37:58,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:58,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:37:58,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,644 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:37:58,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:37:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:37:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:37:58,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:37:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:37:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706365280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:37:58,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:37:58,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:37:58,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471621154] [2022-01-18 06:37:58,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:37:58,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:37:58,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:37:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:37:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:37:58,759 INFO L87 Difference]: Start difference. First operand 9334 states and 34219 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:00,114 INFO L93 Difference]: Finished difference Result 13985 states and 49679 transitions. [2022-01-18 06:38:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 06:38:00,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:00,147 INFO L225 Difference]: With dead ends: 13985 [2022-01-18 06:38:00,147 INFO L226 Difference]: Without dead ends: 13978 [2022-01-18 06:38:00,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:38:00,148 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 159 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:00,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 366 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 860 Invalid, 0 Unknown, 474 Unchecked, 0.4s Time] [2022-01-18 06:38:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2022-01-18 06:38:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 9414. [2022-01-18 06:38:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9414 states, 9413 states have (on average 3.662912992669712) internal successors, (34479), 9413 states have internal predecessors, (34479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9414 states to 9414 states and 34479 transitions. [2022-01-18 06:38:00,409 INFO L78 Accepts]: Start accepts. Automaton has 9414 states and 34479 transitions. Word has length 28 [2022-01-18 06:38:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:00,409 INFO L470 AbstractCegarLoop]: Abstraction has 9414 states and 34479 transitions. [2022-01-18 06:38:00,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9414 states and 34479 transitions. [2022-01-18 06:38:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:00,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:00,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:00,441 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 06:38:00,625 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 06:38:00,626 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:00,627 INFO L85 PathProgramCache]: Analyzing trace with hash 979658826, now seen corresponding path program 55 times [2022-01-18 06:38:00,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:00,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238103293] [2022-01-18 06:38:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:00,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:00,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:00,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238103293] [2022-01-18 06:38:00,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238103293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:00,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382187656] [2022-01-18 06:38:00,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:38:00,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:00,828 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 06:38:00,828 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 06:38:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:01,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:01,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:01,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:38:01,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:38:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:01,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:01,453 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:01,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:01,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:01,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,568 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:01,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:01,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:01,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:01,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:01,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382187656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:01,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:01,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:38:01,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818843386] [2022-01-18 06:38:01,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:38:01,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:38:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:38:01,676 INFO L87 Difference]: Start difference. First operand 9414 states and 34479 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:02,466 INFO L93 Difference]: Finished difference Result 12733 states and 45505 transitions. [2022-01-18 06:38:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:38:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:02,495 INFO L225 Difference]: With dead ends: 12733 [2022-01-18 06:38:02,495 INFO L226 Difference]: Without dead ends: 12622 [2022-01-18 06:38:02,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:38:02,496 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:02,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 273 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 757 Invalid, 0 Unknown, 359 Unchecked, 0.4s Time] [2022-01-18 06:38:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2022-01-18 06:38:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 9439. [2022-01-18 06:38:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9438 states have (on average 3.659991523627887) internal successors, (34543), 9438 states have internal predecessors, (34543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 34543 transitions. [2022-01-18 06:38:02,665 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 34543 transitions. Word has length 28 [2022-01-18 06:38:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:02,665 INFO L470 AbstractCegarLoop]: Abstraction has 9439 states and 34543 transitions. [2022-01-18 06:38:02,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 34543 transitions. [2022-01-18 06:38:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:02,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:02,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:02,696 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 06:38:02,881 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 06:38:02,881 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1048739190, now seen corresponding path program 56 times [2022-01-18 06:38:02,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800432359] [2022-01-18 06:38:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:02,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:03,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800432359] [2022-01-18 06:38:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800432359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830448022] [2022-01-18 06:38:03,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:38:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:03,135 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 06:38:03,136 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 06:38:03,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:38:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:03,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:03,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:38:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:03,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:03,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:38:03,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:38:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:03,882 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:03,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:03,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:03,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:03,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:38:03,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:03,995 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:03,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:04,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:04,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:04,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:38:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:04,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830448022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:04,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:04,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:38:04,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778363104] [2022-01-18 06:38:04,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:04,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:38:04,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:38:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:38:04,115 INFO L87 Difference]: Start difference. First operand 9439 states and 34543 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:05,039 INFO L93 Difference]: Finished difference Result 12769 states and 45644 transitions. [2022-01-18 06:38:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:38:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:05,069 INFO L225 Difference]: With dead ends: 12769 [2022-01-18 06:38:05,069 INFO L226 Difference]: Without dead ends: 12730 [2022-01-18 06:38:05,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:38:05,070 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:05,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 310 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1107 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2022-01-18 06:38:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12730 states. [2022-01-18 06:38:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12730 to 9472. [2022-01-18 06:38:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9472 states, 9471 states have (on average 3.658747756308732) internal successors, (34652), 9471 states have internal predecessors, (34652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9472 states to 9472 states and 34652 transitions. [2022-01-18 06:38:05,290 INFO L78 Accepts]: Start accepts. Automaton has 9472 states and 34652 transitions. Word has length 28 [2022-01-18 06:38:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:05,290 INFO L470 AbstractCegarLoop]: Abstraction has 9472 states and 34652 transitions. [2022-01-18 06:38:05,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 9472 states and 34652 transitions. [2022-01-18 06:38:05,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:05,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:05,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:05,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 06:38:05,506 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 06:38:05,507 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash -108766266, now seen corresponding path program 57 times [2022-01-18 06:38:05,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843261771] [2022-01-18 06:38:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:05,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:05,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:05,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843261771] [2022-01-18 06:38:05,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843261771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553009203] [2022-01-18 06:38:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:38:05,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:05,718 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 06:38:05,718 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 06:38:05,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:38:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:05,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:38:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:06,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:06,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:38:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:38:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:06,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:06,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:06,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 80 [2022-01-18 06:38:06,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,654 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:06,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:06,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:06,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553009203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:06,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:06,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 06:38:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122718175] [2022-01-18 06:38:06,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:38:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:38:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:38:06,778 INFO L87 Difference]: Start difference. First operand 9472 states and 34652 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:09,877 INFO L93 Difference]: Finished difference Result 16278 states and 56064 transitions. [2022-01-18 06:38:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:38:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:09,913 INFO L225 Difference]: With dead ends: 16278 [2022-01-18 06:38:09,913 INFO L226 Difference]: Without dead ends: 16256 [2022-01-18 06:38:09,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=814, Invalid=4442, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:38:09,914 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 331 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:09,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 478 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1298 Invalid, 0 Unknown, 768 Unchecked, 0.7s Time] [2022-01-18 06:38:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16256 states. [2022-01-18 06:38:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16256 to 9906. [2022-01-18 06:38:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9906 states, 9905 states have (on average 3.652700656234225) internal successors, (36180), 9905 states have internal predecessors, (36180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9906 states to 9906 states and 36180 transitions. [2022-01-18 06:38:10,127 INFO L78 Accepts]: Start accepts. Automaton has 9906 states and 36180 transitions. Word has length 28 [2022-01-18 06:38:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:10,127 INFO L470 AbstractCegarLoop]: Abstraction has 9906 states and 36180 transitions. [2022-01-18 06:38:10,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9906 states and 36180 transitions. [2022-01-18 06:38:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:10,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:10,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:10,159 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 06:38:10,343 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 06:38:10,344 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1016834634, now seen corresponding path program 58 times [2022-01-18 06:38:10,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679804757] [2022-01-18 06:38:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:10,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:10,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679804757] [2022-01-18 06:38:10,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679804757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107484411] [2022-01-18 06:38:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:38:10,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:10,640 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 06:38:10,641 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 06:38:10,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:38:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:11,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:11,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:38:11,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:11,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:11,327 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:11,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:11,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:11,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:11,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,452 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:11,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:11,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:11,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:11,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107484411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:11,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:11,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:38:11,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325013658] [2022-01-18 06:38:11,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:11,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:38:11,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:38:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:38:11,570 INFO L87 Difference]: Start difference. First operand 9906 states and 36180 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:12,713 INFO L93 Difference]: Finished difference Result 14522 states and 51606 transitions. [2022-01-18 06:38:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 06:38:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:12,748 INFO L225 Difference]: With dead ends: 14522 [2022-01-18 06:38:12,748 INFO L226 Difference]: Without dead ends: 14513 [2022-01-18 06:38:12,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:38:12,749 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 149 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:12,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 365 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 917 Invalid, 0 Unknown, 551 Unchecked, 0.5s Time] [2022-01-18 06:38:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-01-18 06:38:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 9810. [2022-01-18 06:38:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9810 states, 9809 states have (on average 3.657457437047609) internal successors, (35876), 9809 states have internal predecessors, (35876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9810 states to 9810 states and 35876 transitions. [2022-01-18 06:38:12,948 INFO L78 Accepts]: Start accepts. Automaton has 9810 states and 35876 transitions. Word has length 28 [2022-01-18 06:38:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:12,948 INFO L470 AbstractCegarLoop]: Abstraction has 9810 states and 35876 transitions. [2022-01-18 06:38:12,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 9810 states and 35876 transitions. [2022-01-18 06:38:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:12,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:12,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:12,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 06:38:13,165 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 06:38:13,166 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:13,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1891089294, now seen corresponding path program 59 times [2022-01-18 06:38:13,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:13,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623468985] [2022-01-18 06:38:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:13,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:13,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623468985] [2022-01-18 06:38:13,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623468985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051704411] [2022-01-18 06:38:13,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:38:13,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:13,421 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 06:38:13,422 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 06:38:13,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:38:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:13,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:13,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:38:13,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:13,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:13,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:38:13,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:13,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:14,057 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:14,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:14,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:14,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:14,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:14,193 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:14,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:14,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:14,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:14,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051704411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:14,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:14,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:38:14,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458352094] [2022-01-18 06:38:14,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:14,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:38:14,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:14,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:38:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:38:14,319 INFO L87 Difference]: Start difference. First operand 9810 states and 35876 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:15,039 INFO L93 Difference]: Finished difference Result 13105 states and 46880 transitions. [2022-01-18 06:38:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:38:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:15,068 INFO L225 Difference]: With dead ends: 13105 [2022-01-18 06:38:15,068 INFO L226 Difference]: Without dead ends: 13054 [2022-01-18 06:38:15,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:38:15,068 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:15,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 227 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 626 Invalid, 0 Unknown, 377 Unchecked, 0.3s Time] [2022-01-18 06:38:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2022-01-18 06:38:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 9842. [2022-01-18 06:38:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9842 states, 9841 states have (on average 3.6547098872065846) internal successors, (35966), 9841 states have internal predecessors, (35966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9842 states to 9842 states and 35966 transitions. [2022-01-18 06:38:15,295 INFO L78 Accepts]: Start accepts. Automaton has 9842 states and 35966 transitions. Word has length 28 [2022-01-18 06:38:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:15,295 INFO L470 AbstractCegarLoop]: Abstraction has 9842 states and 35966 transitions. [2022-01-18 06:38:15,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9842 states and 35966 transitions. [2022-01-18 06:38:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:15,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:15,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:15,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 06:38:15,518 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 06:38:15,519 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -137308722, now seen corresponding path program 60 times [2022-01-18 06:38:15,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842475093] [2022-01-18 06:38:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:15,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:15,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842475093] [2022-01-18 06:38:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842475093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801106790] [2022-01-18 06:38:15,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:38:15,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:15,766 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 06:38:15,767 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 06:38:15,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:38:15,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:38:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:16,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:16,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:38:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:16,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:38:16,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:38:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:16,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:16,611 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:16,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:16,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:38:16,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,738 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:16,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:16,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:38:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:16,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801106790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:16,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:16,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:38:16,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310311230] [2022-01-18 06:38:16,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:16,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:38:16,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:16,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:38:16,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:38:16,851 INFO L87 Difference]: Start difference. First operand 9842 states and 35966 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:18,891 INFO L93 Difference]: Finished difference Result 18659 states and 65671 transitions. [2022-01-18 06:38:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:38:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:18,933 INFO L225 Difference]: With dead ends: 18659 [2022-01-18 06:38:18,933 INFO L226 Difference]: Without dead ends: 18597 [2022-01-18 06:38:18,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:38:18,934 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:18,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 408 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1448 Invalid, 0 Unknown, 609 Unchecked, 0.7s Time] [2022-01-18 06:38:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18597 states. [2022-01-18 06:38:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18597 to 9919. [2022-01-18 06:38:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 9918 states have (on average 3.6527525710828797) internal successors, (36228), 9918 states have internal predecessors, (36228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 36228 transitions. [2022-01-18 06:38:19,149 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 36228 transitions. Word has length 28 [2022-01-18 06:38:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:19,150 INFO L470 AbstractCegarLoop]: Abstraction has 9919 states and 36228 transitions. [2022-01-18 06:38:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 36228 transitions. [2022-01-18 06:38:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:19,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:19,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:19,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 06:38:19,366 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 06:38:19,366 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:19,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2038960498, now seen corresponding path program 61 times [2022-01-18 06:38:19,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:19,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756835951] [2022-01-18 06:38:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:19,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:19,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756835951] [2022-01-18 06:38:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756835951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121583077] [2022-01-18 06:38:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:38:19,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:19,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:19,584 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 06:38:19,584 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 06:38:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:19,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:38:19,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:19,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:19,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:38:19,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:20,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:20,151 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:20,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:20,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:38:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:20,266 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:20,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:20,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:20,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:20,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:20,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:38:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121583077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:20,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:20,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:38:20,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809468944] [2022-01-18 06:38:20,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:20,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:38:20,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:38:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:38:20,378 INFO L87 Difference]: Start difference. First operand 9919 states and 36228 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:21,325 INFO L93 Difference]: Finished difference Result 13377 states and 47754 transitions. [2022-01-18 06:38:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:38:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:21,356 INFO L225 Difference]: With dead ends: 13377 [2022-01-18 06:38:21,356 INFO L226 Difference]: Without dead ends: 13362 [2022-01-18 06:38:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:38:21,356 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 159 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:21,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 299 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1020 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2022-01-18 06:38:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2022-01-18 06:38:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 9914. [2022-01-18 06:38:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-01-18 06:38:21,526 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-01-18 06:38:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:21,526 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-01-18 06:38:21,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-01-18 06:38:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:21,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:21,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:21,558 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 06:38:21,743 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 06:38:21,743 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1391298934, now seen corresponding path program 62 times [2022-01-18 06:38:21,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49834372] [2022-01-18 06:38:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:21,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:21,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:21,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49834372] [2022-01-18 06:38:21,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49834372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:21,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612769764] [2022-01-18 06:38:21,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:38:21,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:21,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:21,953 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 06:38:21,954 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 06:38:21,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:38:21,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:21,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:22,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:22,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:22,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:38:22,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:22,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:22,522 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:22,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:22,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:22,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:38:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,642 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:22,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:22,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:22,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:38:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:22,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612769764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:22,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:22,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:38:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852070664] [2022-01-18 06:38:22,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:22,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:38:22,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:38:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:38:22,763 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:23,630 INFO L93 Difference]: Finished difference Result 13306 states and 47539 transitions. [2022-01-18 06:38:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:38:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:23,659 INFO L225 Difference]: With dead ends: 13306 [2022-01-18 06:38:23,659 INFO L226 Difference]: Without dead ends: 13299 [2022-01-18 06:38:23,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 06:38:23,660 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:23,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 966 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2022-01-18 06:38:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-01-18 06:38:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 9914. [2022-01-18 06:38:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9913 states have (on average 3.652980934126904) internal successors, (36212), 9913 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 36212 transitions. [2022-01-18 06:38:23,828 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 36212 transitions. Word has length 28 [2022-01-18 06:38:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 36212 transitions. [2022-01-18 06:38:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 36212 transitions. [2022-01-18 06:38:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:23,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:23,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:23,860 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 06:38:24,045 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 06:38:24,045 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash -356959350, now seen corresponding path program 63 times [2022-01-18 06:38:24,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:24,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242725707] [2022-01-18 06:38:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:24,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:24,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242725707] [2022-01-18 06:38:24,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242725707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884105819] [2022-01-18 06:38:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:38:24,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:24,253 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 06:38:24,253 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 06:38:24,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:38:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:38:24,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:24,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:24,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:24,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2022-01-18 06:38:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:24,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:24,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 99 [2022-01-18 06:38:24,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-01-18 06:38:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:25,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:25,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:25,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 89 [2022-01-18 06:38:26,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:26,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:26,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 6 [2022-01-18 06:38:26,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:26,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-18 06:38:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:26,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884105819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:26,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:26,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:38:26,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122223281] [2022-01-18 06:38:26,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:26,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:38:26,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:26,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:38:26,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:38:26,780 INFO L87 Difference]: Start difference. First operand 9914 states and 36212 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:34,747 INFO L93 Difference]: Finished difference Result 20598 states and 71371 transitions. [2022-01-18 06:38:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 06:38:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:34,796 INFO L225 Difference]: With dead ends: 20598 [2022-01-18 06:38:34,796 INFO L226 Difference]: Without dead ends: 20571 [2022-01-18 06:38:34,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2179, Invalid=14591, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 06:38:34,798 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 391 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 4569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3613 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:34,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 591 Invalid, 4569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 879 Invalid, 0 Unknown, 3613 Unchecked, 0.5s Time] [2022-01-18 06:38:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-01-18 06:38:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10172. [2022-01-18 06:38:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10172 states, 10171 states have (on average 3.6481171959492675) internal successors, (37105), 10171 states have internal predecessors, (37105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10172 states to 10172 states and 37105 transitions. [2022-01-18 06:38:35,045 INFO L78 Accepts]: Start accepts. Automaton has 10172 states and 37105 transitions. Word has length 28 [2022-01-18 06:38:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:35,045 INFO L470 AbstractCegarLoop]: Abstraction has 10172 states and 37105 transitions. [2022-01-18 06:38:35,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10172 states and 37105 transitions. [2022-01-18 06:38:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:35,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:35,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:35,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 06:38:35,261 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 06:38:35,261 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash -49784884, now seen corresponding path program 64 times [2022-01-18 06:38:35,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:35,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130523839] [2022-01-18 06:38:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:35,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:35,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:35,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130523839] [2022-01-18 06:38:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130523839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:35,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395231501] [2022-01-18 06:38:35,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:38:35,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:35,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:35,500 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 06:38:35,503 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 06:38:35,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:38:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:35,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:36,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:38:36,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:36,197 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:36,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:36,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:36,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,321 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:36,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:36,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:36,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:36,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:36,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395231501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:36,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:36,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:38:36,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768967017] [2022-01-18 06:38:36,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:38:36,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:38:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:38:36,451 INFO L87 Difference]: Start difference. First operand 10172 states and 37105 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:36,819 INFO L93 Difference]: Finished difference Result 10593 states and 38328 transitions. [2022-01-18 06:38:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 06:38:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:36,844 INFO L225 Difference]: With dead ends: 10593 [2022-01-18 06:38:36,845 INFO L226 Difference]: Without dead ends: 10553 [2022-01-18 06:38:36,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:38:36,845 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:36,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-01-18 06:38:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10553 states. [2022-01-18 06:38:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10553 to 10210. [2022-01-18 06:38:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 3.6463904398080125) internal successors, (37226), 10209 states have internal predecessors, (37226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 37226 transitions. [2022-01-18 06:38:37,011 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 37226 transitions. Word has length 28 [2022-01-18 06:38:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:37,012 INFO L470 AbstractCegarLoop]: Abstraction has 10210 states and 37226 transitions. [2022-01-18 06:38:37,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 37226 transitions. [2022-01-18 06:38:37,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:37,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:37,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:37,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 06:38:37,230 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 06:38:37,230 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2306790, now seen corresponding path program 65 times [2022-01-18 06:38:37,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:37,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815045947] [2022-01-18 06:38:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:37,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:37,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815045947] [2022-01-18 06:38:37,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815045947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526870225] [2022-01-18 06:38:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:38:37,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:37,436 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 06:38:37,437 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 06:38:37,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:38:37,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:37,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:38:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:37,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:38:38,062 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 06:38:38,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 178 [2022-01-18 06:38:38,075 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-01-18 06:38:38,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 143 treesize of output 97 [2022-01-18 06:38:38,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 06:38:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:38,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,290 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:38,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:38,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:38,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:38,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-01-18 06:38:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:38,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:38,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526870225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:38,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:38,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:38:38,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11262575] [2022-01-18 06:38:38,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:38,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:38:38,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:38,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:38:38,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:38:38,528 INFO L87 Difference]: Start difference. First operand 10210 states and 37226 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:40,309 INFO L93 Difference]: Finished difference Result 14804 states and 52195 transitions. [2022-01-18 06:38:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 06:38:40,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:40,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:40,343 INFO L225 Difference]: With dead ends: 14804 [2022-01-18 06:38:40,343 INFO L226 Difference]: Without dead ends: 14752 [2022-01-18 06:38:40,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:38:40,344 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 206 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:40,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 378 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1409 Invalid, 0 Unknown, 388 Unchecked, 0.8s Time] [2022-01-18 06:38:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2022-01-18 06:38:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 10399. [2022-01-18 06:38:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 10398 states have (on average 3.6400269282554336) internal successors, (37849), 10398 states have internal predecessors, (37849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 37849 transitions. [2022-01-18 06:38:40,542 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 37849 transitions. Word has length 28 [2022-01-18 06:38:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:40,542 INFO L470 AbstractCegarLoop]: Abstraction has 10399 states and 37849 transitions. [2022-01-18 06:38:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 37849 transitions. [2022-01-18 06:38:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:40,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:40,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:40,575 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 06:38:40,760 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 06:38:40,760 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:40,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1205094514, now seen corresponding path program 66 times [2022-01-18 06:38:40,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:40,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13327673] [2022-01-18 06:38:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:40,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:40,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13327673] [2022-01-18 06:38:40,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13327673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201528509] [2022-01-18 06:38:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:38:40,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:40,999 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 06:38:41,001 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 06:38:41,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:38:41,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:38:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:41,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:41,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2022-01-18 06:38:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:41,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:41,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 74 [2022-01-18 06:38:41,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-01-18 06:38:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:41,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:42,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:42,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:42,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-01-18 06:38:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:42,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:42,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:38:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201528509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:42,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:42,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:38:42,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736436372] [2022-01-18 06:38:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:38:42,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:38:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:38:42,859 INFO L87 Difference]: Start difference. First operand 10399 states and 37849 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:48,547 INFO L93 Difference]: Finished difference Result 24273 states and 83766 transitions. [2022-01-18 06:38:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 06:38:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:48,602 INFO L225 Difference]: With dead ends: 24273 [2022-01-18 06:38:48,602 INFO L226 Difference]: Without dead ends: 24230 [2022-01-18 06:38:48,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1801, Invalid=10855, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 06:38:48,604 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 395 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2848 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:48,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 457 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 890 Invalid, 0 Unknown, 2848 Unchecked, 0.6s Time] [2022-01-18 06:38:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24230 states. [2022-01-18 06:38:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24230 to 10392. [2022-01-18 06:38:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 10391 states have (on average 3.6389182946780867) internal successors, (37812), 10391 states have internal predecessors, (37812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 37812 transitions. [2022-01-18 06:38:48,868 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 37812 transitions. Word has length 28 [2022-01-18 06:38:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:48,868 INFO L470 AbstractCegarLoop]: Abstraction has 10392 states and 37812 transitions. [2022-01-18 06:38:48,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 37812 transitions. [2022-01-18 06:38:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:48,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:48,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:48,900 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 06:38:49,085 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 06:38:49,085 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:49,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2027457418, now seen corresponding path program 67 times [2022-01-18 06:38:49,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234985608] [2022-01-18 06:38:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:49,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:49,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234985608] [2022-01-18 06:38:49,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234985608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983512351] [2022-01-18 06:38:49,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:38:49,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:49,329 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 06:38:49,331 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 06:38:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:49,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:38:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:49,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:49,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:38:49,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:49,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:50,022 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:50,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:50,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:50,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:38:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:50,132 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:50,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:50,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:50,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:50,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:38:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983512351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:50,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:50,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:38:50,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461751878] [2022-01-18 06:38:50,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:50,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:38:50,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:38:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:38:50,237 INFO L87 Difference]: Start difference. First operand 10392 states and 37812 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:51,117 INFO L93 Difference]: Finished difference Result 15139 states and 53769 transitions. [2022-01-18 06:38:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:38:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:51,150 INFO L225 Difference]: With dead ends: 15139 [2022-01-18 06:38:51,150 INFO L226 Difference]: Without dead ends: 15122 [2022-01-18 06:38:51,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:38:51,150 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:51,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 311 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 695 Invalid, 0 Unknown, 276 Unchecked, 0.4s Time] [2022-01-18 06:38:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15122 states. [2022-01-18 06:38:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15122 to 10411. [2022-01-18 06:38:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10411 states, 10410 states have (on average 3.6359269932756964) internal successors, (37850), 10410 states have internal predecessors, (37850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 37850 transitions. [2022-01-18 06:38:51,343 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 37850 transitions. Word has length 28 [2022-01-18 06:38:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:51,343 INFO L470 AbstractCegarLoop]: Abstraction has 10411 states and 37850 transitions. [2022-01-18 06:38:51,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 37850 transitions. [2022-01-18 06:38:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:51,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:51,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:51,375 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 06:38:51,560 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 06:38:51,560 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1960335412, now seen corresponding path program 68 times [2022-01-18 06:38:51,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:51,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294120829] [2022-01-18 06:38:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:51,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:51,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294120829] [2022-01-18 06:38:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294120829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312356780] [2022-01-18 06:38:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:38:51,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:51,801 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 06:38:51,802 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 06:38:51,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:38:51,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:38:51,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:52,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:38:52,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:52,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-18 06:38:52,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:38:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:52,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:52,525 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:38:52,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:38:52,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:52,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:38:52,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,636 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:38:52,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:38:52,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:52,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:38:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:52,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312356780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:52,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:52,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:38:52,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211287641] [2022-01-18 06:38:52,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:38:52,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:38:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:38:52,759 INFO L87 Difference]: Start difference. First operand 10411 states and 37850 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:38:53,498 INFO L93 Difference]: Finished difference Result 14636 states and 51837 transitions. [2022-01-18 06:38:53,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:38:53,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:38:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:38:53,530 INFO L225 Difference]: With dead ends: 14636 [2022-01-18 06:38:53,530 INFO L226 Difference]: Without dead ends: 14600 [2022-01-18 06:38:53,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:38:53,531 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:38:53,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 316 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 736 Invalid, 0 Unknown, 424 Unchecked, 0.4s Time] [2022-01-18 06:38:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14600 states. [2022-01-18 06:38:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14600 to 10391. [2022-01-18 06:38:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10391 states, 10390 states have (on average 3.63888354186718) internal successors, (37808), 10390 states have internal predecessors, (37808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10391 states to 10391 states and 37808 transitions. [2022-01-18 06:38:53,713 INFO L78 Accepts]: Start accepts. Automaton has 10391 states and 37808 transitions. Word has length 28 [2022-01-18 06:38:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:38:53,713 INFO L470 AbstractCegarLoop]: Abstraction has 10391 states and 37808 transitions. [2022-01-18 06:38:53,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:38:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10391 states and 37808 transitions. [2022-01-18 06:38:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:38:53,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:38:53,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:38:53,745 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 06:38:53,930 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 06:38:53,930 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:38:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:38:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1530883958, now seen corresponding path program 69 times [2022-01-18 06:38:53,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:38:53,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491084967] [2022-01-18 06:38:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:38:53,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:38:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:38:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:54,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:38:54,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491084967] [2022-01-18 06:38:54,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491084967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:38:54,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010642496] [2022-01-18 06:38:54,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:38:54,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:38:54,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:38:54,188 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 06:38:54,215 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 06:38:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:38:54,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:38:54,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-18 06:38:54,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:38:54,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:38:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:54,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2022-01-18 06:38:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:54,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2022-01-18 06:38:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:38:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:38:55,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:55,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 59 [2022-01-18 06:38:55,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:55,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:38:55,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:38:55,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2022-01-18 06:38:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:38:55,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010642496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:38:55,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:38:55,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-01-18 06:38:55,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977891387] [2022-01-18 06:38:55,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:38:55,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:38:55,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:38:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:38:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:38:55,497 INFO L87 Difference]: Start difference. First operand 10391 states and 37808 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:01,543 INFO L93 Difference]: Finished difference Result 25149 states and 87653 transitions. [2022-01-18 06:39:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 06:39:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:01,600 INFO L225 Difference]: With dead ends: 25149 [2022-01-18 06:39:01,600 INFO L226 Difference]: Without dead ends: 25120 [2022-01-18 06:39:01,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4345 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1856, Invalid=11484, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 06:39:01,601 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 550 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 3092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1903 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:01,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 573 Invalid, 3092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1041 Invalid, 0 Unknown, 1903 Unchecked, 0.7s Time] [2022-01-18 06:39:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25120 states. [2022-01-18 06:39:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25120 to 10527. [2022-01-18 06:39:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10527 states, 10526 states have (on average 3.6303439103173094) internal successors, (38213), 10526 states have internal predecessors, (38213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10527 states to 10527 states and 38213 transitions. [2022-01-18 06:39:01,874 INFO L78 Accepts]: Start accepts. Automaton has 10527 states and 38213 transitions. Word has length 28 [2022-01-18 06:39:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 10527 states and 38213 transitions. [2022-01-18 06:39:01,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 10527 states and 38213 transitions. [2022-01-18 06:39:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:01,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:01,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:01,906 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 06:39:02,091 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 06:39:02,091 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash 824544782, now seen corresponding path program 70 times [2022-01-18 06:39:02,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:02,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664955813] [2022-01-18 06:39:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:02,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:02,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:02,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664955813] [2022-01-18 06:39:02,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664955813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:02,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295086581] [2022-01-18 06:39:02,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:39:02,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:02,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:02,302 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 06:39:02,303 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 06:39:02,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:39:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:02,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:02,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:02,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:39:02,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-18 06:39:02,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 06:39:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:02,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:02,800 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:02,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:02,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:02,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:02,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:02,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:02,915 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:02,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:02,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:02,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:03,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295086581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:03,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:03,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:03,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286321598] [2022-01-18 06:39:03,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:03,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:03,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:03,040 INFO L87 Difference]: Start difference. First operand 10527 states and 38213 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:04,603 INFO L93 Difference]: Finished difference Result 16564 states and 58524 transitions. [2022-01-18 06:39:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:39:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:04,642 INFO L225 Difference]: With dead ends: 16564 [2022-01-18 06:39:04,642 INFO L226 Difference]: Without dead ends: 16549 [2022-01-18 06:39:04,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:39:04,642 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 163 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:04,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 314 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:39:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16549 states. [2022-01-18 06:39:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16549 to 10528. [2022-01-18 06:39:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10528 states, 10527 states have (on average 3.631613945093569) internal successors, (38230), 10527 states have internal predecessors, (38230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10528 states to 10528 states and 38230 transitions. [2022-01-18 06:39:04,869 INFO L78 Accepts]: Start accepts. Automaton has 10528 states and 38230 transitions. Word has length 28 [2022-01-18 06:39:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:04,870 INFO L470 AbstractCegarLoop]: Abstraction has 10528 states and 38230 transitions. [2022-01-18 06:39:04,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10528 states and 38230 transitions. [2022-01-18 06:39:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:04,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:04,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:04,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 06:39:05,091 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 06:39:05,091 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash -228189426, now seen corresponding path program 71 times [2022-01-18 06:39:05,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:05,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022507585] [2022-01-18 06:39:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:05,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:05,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022507585] [2022-01-18 06:39:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022507585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226879138] [2022-01-18 06:39:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:39:05,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:05,302 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 06:39:05,303 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 06:39:05,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:39:05,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:05,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:05,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 06:39:05,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:39:05,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-18 06:39:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:05,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:05,881 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:05,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:05,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:05,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:05,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:05,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:05,995 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:05,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:06,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:06,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:06,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:06,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226879138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:06,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:06,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:06,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866157605] [2022-01-18 06:39:06,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:06,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:06,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:06,113 INFO L87 Difference]: Start difference. First operand 10528 states and 38230 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:06,710 INFO L93 Difference]: Finished difference Result 10805 states and 39021 transitions. [2022-01-18 06:39:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:39:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:06,733 INFO L225 Difference]: With dead ends: 10805 [2022-01-18 06:39:06,734 INFO L226 Difference]: Without dead ends: 10728 [2022-01-18 06:39:06,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:39:06,734 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:06,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 214 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:39:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-01-18 06:39:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10558. [2022-01-18 06:39:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10558 states, 10557 states have (on average 3.63010324902908) internal successors, (38323), 10557 states have internal predecessors, (38323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 38323 transitions. [2022-01-18 06:39:06,933 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 38323 transitions. Word has length 28 [2022-01-18 06:39:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:06,933 INFO L470 AbstractCegarLoop]: Abstraction has 10558 states and 38323 transitions. [2022-01-18 06:39:06,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 38323 transitions. [2022-01-18 06:39:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:06,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:06,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:06,984 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 06:39:07,179 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 06:39:07,179 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 839685138, now seen corresponding path program 72 times [2022-01-18 06:39:07,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:07,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303483400] [2022-01-18 06:39:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:07,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:07,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:07,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303483400] [2022-01-18 06:39:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303483400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:07,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394586404] [2022-01-18 06:39:07,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:39:07,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:07,396 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 06:39:07,396 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 06:39:07,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 06:39:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:07,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:07,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:39:07,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-18 06:39:07,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 06:39:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:07,907 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:07,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:07,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:08,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:08,044 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:08,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:08,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:08,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394586404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:08,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:08,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219418805] [2022-01-18 06:39:08,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:08,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:08,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:08,168 INFO L87 Difference]: Start difference. First operand 10558 states and 38323 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:09,318 INFO L93 Difference]: Finished difference Result 14029 states and 50015 transitions. [2022-01-18 06:39:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:39:09,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:09,349 INFO L225 Difference]: With dead ends: 14029 [2022-01-18 06:39:09,349 INFO L226 Difference]: Without dead ends: 14001 [2022-01-18 06:39:09,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:39:09,349 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 108 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:09,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 313 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:39:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14001 states. [2022-01-18 06:39:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14001 to 10577. [2022-01-18 06:39:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10577 states, 10576 states have (on average 3.63142965204236) internal successors, (38406), 10576 states have internal predecessors, (38406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10577 states to 10577 states and 38406 transitions. [2022-01-18 06:39:09,546 INFO L78 Accepts]: Start accepts. Automaton has 10577 states and 38406 transitions. Word has length 28 [2022-01-18 06:39:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:09,546 INFO L470 AbstractCegarLoop]: Abstraction has 10577 states and 38406 transitions. [2022-01-18 06:39:09,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10577 states and 38406 transitions. [2022-01-18 06:39:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:09,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:09,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:09,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:09,787 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 06:39:09,787 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1348931822, now seen corresponding path program 73 times [2022-01-18 06:39:09,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:09,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54694706] [2022-01-18 06:39:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:09,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:09,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54694706] [2022-01-18 06:39:09,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54694706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771534680] [2022-01-18 06:39:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:39:09,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:10,001 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 06:39:10,002 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 06:39:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:10,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:10,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:39:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:39:10,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:39:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:10,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:10,620 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:10,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:39:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:10,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:10,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,728 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:10,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:10,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:39:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:10,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771534680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:10,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:10,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:10,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439667054] [2022-01-18 06:39:10,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:10,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:10,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:10,846 INFO L87 Difference]: Start difference. First operand 10577 states and 38406 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:11,313 INFO L93 Difference]: Finished difference Result 10800 states and 39061 transitions. [2022-01-18 06:39:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:39:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:11,335 INFO L225 Difference]: With dead ends: 10800 [2022-01-18 06:39:11,336 INFO L226 Difference]: Without dead ends: 10775 [2022-01-18 06:39:11,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:39:11,336 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:11,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:39:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-01-18 06:39:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 10612. [2022-01-18 06:39:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 3.6314202242955425) internal successors, (38533), 10611 states have internal predecessors, (38533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 38533 transitions. [2022-01-18 06:39:11,492 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 38533 transitions. Word has length 28 [2022-01-18 06:39:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:11,492 INFO L470 AbstractCegarLoop]: Abstraction has 10612 states and 38533 transitions. [2022-01-18 06:39:11,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 38533 transitions. [2022-01-18 06:39:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:11,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:11,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:11,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 06:39:11,709 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 06:39:11,709 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1958543862, now seen corresponding path program 74 times [2022-01-18 06:39:11,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:11,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742858661] [2022-01-18 06:39:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:11,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:11,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742858661] [2022-01-18 06:39:11,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742858661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496059044] [2022-01-18 06:39:11,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:39:11,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:11,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:11,941 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 06:39:11,942 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 06:39:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:39:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:12,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:12,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:39:12,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-01-18 06:39:12,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:12,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-01-18 06:39:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:12,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:12,494 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:12,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:39:12,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:12,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,612 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:12,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:12,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:12,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:39:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:12,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496059044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:12,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:12,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:12,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524531293] [2022-01-18 06:39:12,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:12,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:12,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:12,720 INFO L87 Difference]: Start difference. First operand 10612 states and 38533 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:13,241 INFO L93 Difference]: Finished difference Result 10784 states and 39039 transitions. [2022-01-18 06:39:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:39:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:13,263 INFO L225 Difference]: With dead ends: 10784 [2022-01-18 06:39:13,263 INFO L226 Difference]: Without dead ends: 10769 [2022-01-18 06:39:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:39:13,263 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:13,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 192 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:39:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2022-01-18 06:39:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 10619. [2022-01-18 06:39:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 3.631851572800904) internal successors, (38563), 10618 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 38563 transitions. [2022-01-18 06:39:13,418 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 38563 transitions. Word has length 28 [2022-01-18 06:39:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:13,418 INFO L470 AbstractCegarLoop]: Abstraction has 10619 states and 38563 transitions. [2022-01-18 06:39:13,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 38563 transitions. [2022-01-18 06:39:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:13,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:13,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:13,449 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 06:39:13,634 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 06:39:13,634 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1830535506, now seen corresponding path program 75 times [2022-01-18 06:39:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100556182] [2022-01-18 06:39:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:13,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100556182] [2022-01-18 06:39:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100556182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735987969] [2022-01-18 06:39:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:39:13,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:13,848 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 06:39:13,851 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 06:39:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:39:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:13,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:39:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:14,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:14,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:14,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 56 [2022-01-18 06:39:14,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:14,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:14,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 82 [2022-01-18 06:39:14,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-01-18 06:39:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:14,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:15,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:15,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:15,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:39:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:15,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:15,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-01-18 06:39:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:15,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735987969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:15,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:15,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:39:15,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51172656] [2022-01-18 06:39:15,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:15,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:39:15,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:15,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:39:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:39:15,677 INFO L87 Difference]: Start difference. First operand 10619 states and 38563 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:18,169 INFO L93 Difference]: Finished difference Result 18254 states and 64192 transitions. [2022-01-18 06:39:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 06:39:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:18,212 INFO L225 Difference]: With dead ends: 18254 [2022-01-18 06:39:18,212 INFO L226 Difference]: Without dead ends: 18126 [2022-01-18 06:39:18,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=557, Invalid=5295, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 06:39:18,213 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 238 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:18,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 436 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 645 Invalid, 0 Unknown, 1552 Unchecked, 0.3s Time] [2022-01-18 06:39:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2022-01-18 06:39:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 10703. [2022-01-18 06:39:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10703 states, 10702 states have (on average 3.6252102410764344) internal successors, (38797), 10702 states have internal predecessors, (38797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 38797 transitions. [2022-01-18 06:39:18,445 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 38797 transitions. Word has length 28 [2022-01-18 06:39:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:18,445 INFO L470 AbstractCegarLoop]: Abstraction has 10703 states and 38797 transitions. [2022-01-18 06:39:18,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 38797 transitions. [2022-01-18 06:39:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:18,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:18,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:18,483 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 06:39:18,675 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 06:39:18,675 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1712762762, now seen corresponding path program 76 times [2022-01-18 06:39:18,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:18,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364575641] [2022-01-18 06:39:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:18,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:18,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:18,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364575641] [2022-01-18 06:39:18,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364575641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:18,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052667165] [2022-01-18 06:39:18,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:39:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:18,889 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 06:39:18,889 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 06:39:18,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:39:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:18,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:19,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:39:19,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:39:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:19,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:19,526 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:19,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:19,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:39:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,654 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:19,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:19,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:19,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:39:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052667165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:19,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:19,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:19,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555935388] [2022-01-18 06:39:19,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:19,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:19,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:19,777 INFO L87 Difference]: Start difference. First operand 10703 states and 38797 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:20,920 INFO L93 Difference]: Finished difference Result 15689 states and 55485 transitions. [2022-01-18 06:39:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 06:39:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:20,956 INFO L225 Difference]: With dead ends: 15689 [2022-01-18 06:39:20,956 INFO L226 Difference]: Without dead ends: 15614 [2022-01-18 06:39:20,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 06:39:20,957 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 152 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:20,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 339 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1001 Invalid, 0 Unknown, 395 Unchecked, 0.5s Time] [2022-01-18 06:39:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15614 states. [2022-01-18 06:39:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15614 to 10735. [2022-01-18 06:39:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10735 states, 10734 states have (on average 3.6251164523942614) internal successors, (38912), 10734 states have internal predecessors, (38912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10735 states to 10735 states and 38912 transitions. [2022-01-18 06:39:21,176 INFO L78 Accepts]: Start accepts. Automaton has 10735 states and 38912 transitions. Word has length 28 [2022-01-18 06:39:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 10735 states and 38912 transitions. [2022-01-18 06:39:21,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10735 states and 38912 transitions. [2022-01-18 06:39:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:21,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:21,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:21,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:21,417 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 06:39:21,417 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash 436033774, now seen corresponding path program 77 times [2022-01-18 06:39:21,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:21,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57097191] [2022-01-18 06:39:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:21,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:21,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57097191] [2022-01-18 06:39:21,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57097191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:21,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376343379] [2022-01-18 06:39:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:39:21,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:21,622 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 06:39:21,623 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 06:39:21,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:39:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:21,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:21,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:22,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:39:22,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:39:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:22,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:22,218 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:22,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:22,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:39:22,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,346 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:22,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:22,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:39:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:22,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376343379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:22,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:22,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:22,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503623645] [2022-01-18 06:39:22,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:22,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:22,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:22,461 INFO L87 Difference]: Start difference. First operand 10735 states and 38912 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:23,251 INFO L93 Difference]: Finished difference Result 14307 states and 50819 transitions. [2022-01-18 06:39:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:39:23,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:23,284 INFO L225 Difference]: With dead ends: 14307 [2022-01-18 06:39:23,284 INFO L226 Difference]: Without dead ends: 14169 [2022-01-18 06:39:23,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:39:23,284 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 165 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:23,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 248 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 811 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2022-01-18 06:39:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14169 states. [2022-01-18 06:39:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14169 to 10786. [2022-01-18 06:39:23,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10786 states, 10785 states have (on average 3.6205841446453406) internal successors, (39048), 10785 states have internal predecessors, (39048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10786 states to 10786 states and 39048 transitions. [2022-01-18 06:39:23,482 INFO L78 Accepts]: Start accepts. Automaton has 10786 states and 39048 transitions. Word has length 28 [2022-01-18 06:39:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:23,482 INFO L470 AbstractCegarLoop]: Abstraction has 10786 states and 39048 transitions. [2022-01-18 06:39:23,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10786 states and 39048 transitions. [2022-01-18 06:39:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:23,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:23,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:23,514 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 06:39:23,699 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 06:39:23,700 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1294735958, now seen corresponding path program 78 times [2022-01-18 06:39:23,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569697405] [2022-01-18 06:39:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:23,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:23,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569697405] [2022-01-18 06:39:23,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569697405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468743200] [2022-01-18 06:39:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:39:23,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:23,914 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 06:39:23,917 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 06:39:23,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:39:23,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:39:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:24,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:24,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:24,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 50 [2022-01-18 06:39:24,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-01-18 06:39:24,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:24,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 58 [2022-01-18 06:39:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:24,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:24,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:24,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:39:25,128 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:39:25,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-01-18 06:39:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468743200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:25,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:25,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:39:25,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115351288] [2022-01-18 06:39:25,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:25,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:39:25,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:39:25,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:39:25,460 INFO L87 Difference]: Start difference. First operand 10786 states and 39048 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:28,970 INFO L93 Difference]: Finished difference Result 22215 states and 76572 transitions. [2022-01-18 06:39:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 06:39:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:29,018 INFO L225 Difference]: With dead ends: 22215 [2022-01-18 06:39:29,018 INFO L226 Difference]: Without dead ends: 22047 [2022-01-18 06:39:29,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1143, Invalid=7599, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 06:39:29,019 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 499 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1524 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:29,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 501 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1384 Invalid, 0 Unknown, 1524 Unchecked, 0.7s Time] [2022-01-18 06:39:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22047 states. [2022-01-18 06:39:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22047 to 10926. [2022-01-18 06:39:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10926 states, 10925 states have (on average 3.6135469107551486) internal successors, (39478), 10925 states have internal predecessors, (39478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10926 states to 10926 states and 39478 transitions. [2022-01-18 06:39:29,268 INFO L78 Accepts]: Start accepts. Automaton has 10926 states and 39478 transitions. Word has length 28 [2022-01-18 06:39:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:29,268 INFO L470 AbstractCegarLoop]: Abstraction has 10926 states and 39478 transitions. [2022-01-18 06:39:29,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10926 states and 39478 transitions. [2022-01-18 06:39:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:29,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:29,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:29,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:29,484 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 06:39:29,484 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:29,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1101740526, now seen corresponding path program 79 times [2022-01-18 06:39:29,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:29,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475954817] [2022-01-18 06:39:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:29,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:29,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475954817] [2022-01-18 06:39:29,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475954817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874041241] [2022-01-18 06:39:29,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:39:29,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:29,714 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 06:39:29,714 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 06:39:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:29,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:30,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:39:30,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:39:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:30,326 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:30,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:30,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:39:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,456 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:30,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:30,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:30,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:30,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:39:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:30,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874041241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:30,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:30,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828878053] [2022-01-18 06:39:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:30,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:30,570 INFO L87 Difference]: Start difference. First operand 10926 states and 39478 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:31,391 INFO L93 Difference]: Finished difference Result 14564 states and 51592 transitions. [2022-01-18 06:39:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:39:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:31,423 INFO L225 Difference]: With dead ends: 14564 [2022-01-18 06:39:31,423 INFO L226 Difference]: Without dead ends: 14538 [2022-01-18 06:39:31,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:39:31,423 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:31,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 303 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1174 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-01-18 06:39:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14538 states. [2022-01-18 06:39:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14538 to 10947. [2022-01-18 06:39:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 3.613374748766673) internal successors, (39552), 10946 states have internal predecessors, (39552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 39552 transitions. [2022-01-18 06:39:31,606 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 39552 transitions. Word has length 28 [2022-01-18 06:39:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:31,606 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 39552 transitions. [2022-01-18 06:39:31,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 39552 transitions. [2022-01-18 06:39:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:31,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:31,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:31,639 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 06:39:31,824 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 06:39:31,824 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash 715331910, now seen corresponding path program 80 times [2022-01-18 06:39:31,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:31,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664917694] [2022-01-18 06:39:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:31,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:32,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:32,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664917694] [2022-01-18 06:39:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664917694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884989897] [2022-01-18 06:39:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:39:32,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:32,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:32,075 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 06:39:32,075 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 06:39:32,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:39:32,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:39:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:32,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:32,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:32,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:39:32,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:32,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:39:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:33,024 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:39:33,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 88 [2022-01-18 06:39:33,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:33,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:33,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:33,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:33,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:33,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:33,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:33,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:33,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884989897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:33,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:33,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 06:39:33,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187982005] [2022-01-18 06:39:33,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:33,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:39:33,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:39:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:39:33,596 INFO L87 Difference]: Start difference. First operand 10947 states and 39552 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:34,542 INFO L93 Difference]: Finished difference Result 15320 states and 54028 transitions. [2022-01-18 06:39:34,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:39:34,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:34,575 INFO L225 Difference]: With dead ends: 15320 [2022-01-18 06:39:34,575 INFO L226 Difference]: Without dead ends: 15274 [2022-01-18 06:39:34,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:39:34,576 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:34,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 223 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 393 Invalid, 0 Unknown, 609 Unchecked, 0.2s Time] [2022-01-18 06:39:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15274 states. [2022-01-18 06:39:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15274 to 11320. [2022-01-18 06:39:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11319 states have (on average 3.610301263362488) internal successors, (40865), 11319 states have internal predecessors, (40865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 40865 transitions. [2022-01-18 06:39:34,817 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 40865 transitions. Word has length 28 [2022-01-18 06:39:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 11320 states and 40865 transitions. [2022-01-18 06:39:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 40865 transitions. [2022-01-18 06:39:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:34,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:34,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:34,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:35,035 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 06:39:35,035 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -260986934, now seen corresponding path program 81 times [2022-01-18 06:39:35,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:35,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312976771] [2022-01-18 06:39:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:35,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:35,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:35,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312976771] [2022-01-18 06:39:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312976771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467219244] [2022-01-18 06:39:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:39:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:35,279 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 06:39:35,279 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 06:39:35,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:39:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:35,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:39:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:35,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:35,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:35,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 52 [2022-01-18 06:39:35,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:35,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 93 [2022-01-18 06:39:35,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2022-01-18 06:39:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:35,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:36,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:36,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:39:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:36,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:36,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 75 [2022-01-18 06:39:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:36,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467219244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:36,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:36,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:39:36,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247443557] [2022-01-18 06:39:36,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:36,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:39:36,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:39:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:39:36,967 INFO L87 Difference]: Start difference. First operand 11320 states and 40865 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:39,768 INFO L93 Difference]: Finished difference Result 20879 states and 72924 transitions. [2022-01-18 06:39:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:39:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:39,813 INFO L225 Difference]: With dead ends: 20879 [2022-01-18 06:39:39,813 INFO L226 Difference]: Without dead ends: 20796 [2022-01-18 06:39:39,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=734, Invalid=6072, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:39:39,814 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 284 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1580 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:39,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 564 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 835 Invalid, 0 Unknown, 1580 Unchecked, 0.4s Time] [2022-01-18 06:39:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20796 states. [2022-01-18 06:39:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20796 to 11364. [2022-01-18 06:39:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11364 states, 11363 states have (on average 3.6121622810877407) internal successors, (41045), 11363 states have internal predecessors, (41045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11364 states to 11364 states and 41045 transitions. [2022-01-18 06:39:40,126 INFO L78 Accepts]: Start accepts. Automaton has 11364 states and 41045 transitions. Word has length 28 [2022-01-18 06:39:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:40,126 INFO L470 AbstractCegarLoop]: Abstraction has 11364 states and 41045 transitions. [2022-01-18 06:39:40,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11364 states and 41045 transitions. [2022-01-18 06:39:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:40,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:40,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:40,158 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 06:39:40,343 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 06:39:40,344 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1267822518, now seen corresponding path program 82 times [2022-01-18 06:39:40,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757308637] [2022-01-18 06:39:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:40,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:40,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757308637] [2022-01-18 06:39:40,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757308637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:40,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271317440] [2022-01-18 06:39:40,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:39:40,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:40,589 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:40,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 06:39:40,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:39:40,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:40,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 06:39:40,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-18 06:39:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:40,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:41,126 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:41,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:41,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:41,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:41,256 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:41,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:41,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271317440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:41,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378688862] [2022-01-18 06:39:41,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:41,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:41,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:41,359 INFO L87 Difference]: Start difference. First operand 11364 states and 41045 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:42,596 INFO L93 Difference]: Finished difference Result 16550 states and 58539 transitions. [2022-01-18 06:39:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:39:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:42,653 INFO L225 Difference]: With dead ends: 16550 [2022-01-18 06:39:42,653 INFO L226 Difference]: Without dead ends: 16496 [2022-01-18 06:39:42,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:39:42,654 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 130 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:42,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 220 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:39:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16496 states. [2022-01-18 06:39:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16496 to 11409. [2022-01-18 06:39:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 3.612201963534362) internal successors, (41208), 11408 states have internal predecessors, (41208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 41208 transitions. [2022-01-18 06:39:42,906 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 41208 transitions. Word has length 28 [2022-01-18 06:39:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 41208 transitions. [2022-01-18 06:39:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 41208 transitions. [2022-01-18 06:39:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:42,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:42,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:42,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 06:39:43,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:43,125 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1136858162, now seen corresponding path program 83 times [2022-01-18 06:39:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237579235] [2022-01-18 06:39:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:43,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:43,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237579235] [2022-01-18 06:39:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237579235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490303810] [2022-01-18 06:39:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:39:43,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:43,418 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:43,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 06:39:43,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:39:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:39:43,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:43,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:43,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:39:43,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:39:43,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 06:39:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:43,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:43,934 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:43,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:44,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:44,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:44,069 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:44,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:44,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:44,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490303810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:44,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:44,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:44,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872671364] [2022-01-18 06:39:44,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:44,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:44,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:44,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:44,190 INFO L87 Difference]: Start difference. First operand 11409 states and 41208 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:45,132 INFO L93 Difference]: Finished difference Result 15005 states and 53333 transitions. [2022-01-18 06:39:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:39:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:45,163 INFO L225 Difference]: With dead ends: 15005 [2022-01-18 06:39:45,164 INFO L226 Difference]: Without dead ends: 14990 [2022-01-18 06:39:45,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:39:45,164 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:45,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 265 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1136 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-01-18 06:39:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14990 states. [2022-01-18 06:39:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14990 to 11412. [2022-01-18 06:39:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11412 states, 11411 states have (on average 3.6137937078257822) internal successors, (41237), 11411 states have internal predecessors, (41237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11412 states to 11412 states and 41237 transitions. [2022-01-18 06:39:45,358 INFO L78 Accepts]: Start accepts. Automaton has 11412 states and 41237 transitions. Word has length 28 [2022-01-18 06:39:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:45,359 INFO L470 AbstractCegarLoop]: Abstraction has 11412 states and 41237 transitions. [2022-01-18 06:39:45,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 11412 states and 41237 transitions. [2022-01-18 06:39:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:45,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:45,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:45,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:45,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:45,576 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:45,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1670893074, now seen corresponding path program 84 times [2022-01-18 06:39:45,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:45,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970547186] [2022-01-18 06:39:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:45,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:45,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970547186] [2022-01-18 06:39:45,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970547186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346026802] [2022-01-18 06:39:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:39:45,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:45,811 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:45,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 06:39:45,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:39:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:45,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:46,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-01-18 06:39:46,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 06:39:46,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-18 06:39:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:46,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:46,318 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:46,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:39:46,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:46,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:46,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:46,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:46,436 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:46,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:46,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:46,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:46,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:39:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:46,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346026802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:46,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:46,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-01-18 06:39:46,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904710463] [2022-01-18 06:39:46,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:46,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:39:46,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:39:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:39:46,553 INFO L87 Difference]: Start difference. First operand 11412 states and 41237 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:47,009 INFO L93 Difference]: Finished difference Result 11607 states and 41785 transitions. [2022-01-18 06:39:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:39:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:47,035 INFO L225 Difference]: With dead ends: 11607 [2022-01-18 06:39:47,035 INFO L226 Difference]: Without dead ends: 11548 [2022-01-18 06:39:47,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:39:47,036 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:47,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 201 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 832 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-01-18 06:39:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11548 states. [2022-01-18 06:39:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11548 to 11432. [2022-01-18 06:39:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11432 states, 11431 states have (on average 3.6128072784533285) internal successors, (41298), 11431 states have internal predecessors, (41298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11432 states to 11432 states and 41298 transitions. [2022-01-18 06:39:47,229 INFO L78 Accepts]: Start accepts. Automaton has 11432 states and 41298 transitions. Word has length 28 [2022-01-18 06:39:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 11432 states and 41298 transitions. [2022-01-18 06:39:47,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11432 states and 41298 transitions. [2022-01-18 06:39:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:47,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:47,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:47,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:47,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:47,448 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash -683401462, now seen corresponding path program 85 times [2022-01-18 06:39:47,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959596710] [2022-01-18 06:39:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:47,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:47,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959596710] [2022-01-18 06:39:47,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959596710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:47,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88190981] [2022-01-18 06:39:47,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:39:47,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:47,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:47,708 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:47,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 06:39:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:47,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:48,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:39:48,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 06:39:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-01-18 06:39:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:48,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:48,379 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:48,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:39:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:48,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:48,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,532 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:48,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:48,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:48,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:39:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:48,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88190981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:48,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:48,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:48,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792771072] [2022-01-18 06:39:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:48,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:48,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:48,665 INFO L87 Difference]: Start difference. First operand 11432 states and 41298 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:49,124 INFO L93 Difference]: Finished difference Result 11602 states and 41770 transitions. [2022-01-18 06:39:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:39:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:49,148 INFO L225 Difference]: With dead ends: 11602 [2022-01-18 06:39:49,148 INFO L226 Difference]: Without dead ends: 11581 [2022-01-18 06:39:49,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:39:49,149 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:49,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 151 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:39:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11581 states. [2022-01-18 06:39:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11581 to 11435. [2022-01-18 06:39:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11435 states, 11434 states have (on average 3.613258702116495) internal successors, (41314), 11434 states have internal predecessors, (41314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11435 states to 11435 states and 41314 transitions. [2022-01-18 06:39:49,317 INFO L78 Accepts]: Start accepts. Automaton has 11435 states and 41314 transitions. Word has length 28 [2022-01-18 06:39:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:49,317 INFO L470 AbstractCegarLoop]: Abstraction has 11435 states and 41314 transitions. [2022-01-18 06:39:49,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 11435 states and 41314 transitions. [2022-01-18 06:39:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:49,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:49,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:49,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 06:39:49,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:49,535 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1328510830, now seen corresponding path program 86 times [2022-01-18 06:39:49,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:49,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714684198] [2022-01-18 06:39:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:49,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:49,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714684198] [2022-01-18 06:39:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714684198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:49,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272707449] [2022-01-18 06:39:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:39:49,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:49,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:49,790 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:49,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 06:39:49,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:39:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:49,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:50,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-01-18 06:39:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:50,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:39:50,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:39:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:50,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:50,311 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:50,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:39:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:50,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,465 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:50,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:50,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:50,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:39:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:50,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272707449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:50,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:50,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:50,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124396211] [2022-01-18 06:39:50,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:50,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:50,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:50,606 INFO L87 Difference]: Start difference. First operand 11435 states and 41314 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:51,143 INFO L93 Difference]: Finished difference Result 11724 states and 42165 transitions. [2022-01-18 06:39:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:39:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:51,167 INFO L225 Difference]: With dead ends: 11724 [2022-01-18 06:39:51,167 INFO L226 Difference]: Without dead ends: 11709 [2022-01-18 06:39:51,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:39:51,168 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:51,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 230 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:39:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2022-01-18 06:39:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11466. [2022-01-18 06:39:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11466 states, 11465 states have (on average 3.6139555167902313) internal successors, (41434), 11465 states have internal predecessors, (41434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11466 states to 11466 states and 41434 transitions. [2022-01-18 06:39:51,349 INFO L78 Accepts]: Start accepts. Automaton has 11466 states and 41434 transitions. Word has length 28 [2022-01-18 06:39:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:51,350 INFO L470 AbstractCegarLoop]: Abstraction has 11466 states and 41434 transitions. [2022-01-18 06:39:51,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 11466 states and 41434 transitions. [2022-01-18 06:39:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:51,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:51,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:51,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 06:39:51,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 06:39:51,568 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1120177546, now seen corresponding path program 87 times [2022-01-18 06:39:51,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253860929] [2022-01-18 06:39:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:51,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:51,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253860929] [2022-01-18 06:39:51,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253860929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640336220] [2022-01-18 06:39:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:39:51,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:51,837 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:51,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 06:39:51,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:39:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:51,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 06:39:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:52,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:39:52,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:39:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:52,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:52,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-01-18 06:39:52,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:52,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 72 [2022-01-18 06:39:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:53,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:54,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:54,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 61 [2022-01-18 06:39:54,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:54,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:39:54,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-01-18 06:39:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:54,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640336220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:54,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:54,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 31 [2022-01-18 06:39:54,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271062624] [2022-01-18 06:39:54,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:54,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 06:39:54,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 06:39:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:39:54,366 INFO L87 Difference]: Start difference. First operand 11466 states and 41434 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:57,062 INFO L93 Difference]: Finished difference Result 19431 states and 68298 transitions. [2022-01-18 06:39:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:39:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:39:57,107 INFO L225 Difference]: With dead ends: 19431 [2022-01-18 06:39:57,107 INFO L226 Difference]: Without dead ends: 19417 [2022-01-18 06:39:57,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=669, Invalid=5651, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 06:39:57,108 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 216 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2699 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:39:57,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 647 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 807 Invalid, 0 Unknown, 2699 Unchecked, 0.4s Time] [2022-01-18 06:39:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19417 states. [2022-01-18 06:39:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19417 to 11508. [2022-01-18 06:39:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 3.613105066481272) internal successors, (41576), 11507 states have internal predecessors, (41576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 41576 transitions. [2022-01-18 06:39:57,347 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 41576 transitions. Word has length 28 [2022-01-18 06:39:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:39:57,347 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 41576 transitions. [2022-01-18 06:39:57,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 41576 transitions. [2022-01-18 06:39:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:39:57,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:39:57,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:39:57,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 06:39:57,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 06:39:57,564 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:39:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:39:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash -908959978, now seen corresponding path program 88 times [2022-01-18 06:39:57,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:39:57,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947863396] [2022-01-18 06:39:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:39:57,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:39:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:39:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:57,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:39:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947863396] [2022-01-18 06:39:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947863396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:39:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329455668] [2022-01-18 06:39:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:39:57,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:39:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:39:57,764 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:39:57,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 06:39:57,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:39:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:39:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:39:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:39:57,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:39:57,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:39:58,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-18 06:39:58,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-18 06:39:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:58,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:39:58,236 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:39:58,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:39:58,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:58,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:58,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:58,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:39:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:58,415 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:39:58,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:39:58,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:58,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:39:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:39:58,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:39:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:39:58,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329455668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:39:58,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:39:58,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:39:58,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785427814] [2022-01-18 06:39:58,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:39:58,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:39:58,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:39:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:39:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:39:58,596 INFO L87 Difference]: Start difference. First operand 11508 states and 41576 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:39:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:39:59,962 INFO L93 Difference]: Finished difference Result 18248 states and 64138 transitions. [2022-01-18 06:39:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:39:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:39:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:00,001 INFO L225 Difference]: With dead ends: 18248 [2022-01-18 06:40:00,001 INFO L226 Difference]: Without dead ends: 18223 [2022-01-18 06:40:00,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1544, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:40:00,002 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:00,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 319 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 06:40:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18223 states. [2022-01-18 06:40:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18223 to 11481. [2022-01-18 06:40:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11481 states, 11480 states have (on average 3.6137630662020905) internal successors, (41486), 11480 states have internal predecessors, (41486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11481 states to 11481 states and 41486 transitions. [2022-01-18 06:40:00,229 INFO L78 Accepts]: Start accepts. Automaton has 11481 states and 41486 transitions. Word has length 28 [2022-01-18 06:40:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 11481 states and 41486 transitions. [2022-01-18 06:40:00,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11481 states and 41486 transitions. [2022-01-18 06:40:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:00,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:00,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:00,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 06:40:00,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:00,447 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1021738998, now seen corresponding path program 89 times [2022-01-18 06:40:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:00,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460472024] [2022-01-18 06:40:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:00,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:00,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460472024] [2022-01-18 06:40:00,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460472024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143381397] [2022-01-18 06:40:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:40:00,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:00,650 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 06:40:00,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 06:40:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:00,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:00,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:40:00,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-01-18 06:40:00,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:00,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:00,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 06:40:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:01,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:01,184 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:01,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 59 [2022-01-18 06:40:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:01,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:01,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:01,303 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:01,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:01,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-18 06:40:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143381397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:01,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:01,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:40:01,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951381828] [2022-01-18 06:40:01,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:01,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:40:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:40:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:40:01,417 INFO L87 Difference]: Start difference. First operand 11481 states and 41486 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:01,950 INFO L93 Difference]: Finished difference Result 11772 states and 42335 transitions. [2022-01-18 06:40:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:40:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:01,978 INFO L225 Difference]: With dead ends: 11772 [2022-01-18 06:40:01,978 INFO L226 Difference]: Without dead ends: 11757 [2022-01-18 06:40:01,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:40:01,978 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 90 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:01,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 222 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:40:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2022-01-18 06:40:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11473. [2022-01-18 06:40:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11473 states, 11472 states have (on average 3.614539748953975) internal successors, (41466), 11472 states have internal predecessors, (41466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11473 states to 11473 states and 41466 transitions. [2022-01-18 06:40:02,150 INFO L78 Accepts]: Start accepts. Automaton has 11473 states and 41466 transitions. Word has length 28 [2022-01-18 06:40:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 11473 states and 41466 transitions. [2022-01-18 06:40:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11473 states and 41466 transitions. [2022-01-18 06:40:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:02,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:02,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:02,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 06:40:02,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:02,368 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 408275564, now seen corresponding path program 90 times [2022-01-18 06:40:02,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:02,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842356874] [2022-01-18 06:40:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:02,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:02,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842356874] [2022-01-18 06:40:02,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842356874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786088562] [2022-01-18 06:40:02,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:40:02,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:02,608 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 06:40:02,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:40:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:40:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:02,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:03,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:40:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:03,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:40:03,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:03,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 06:40:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:03,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:03,691 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:40:03,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 89 [2022-01-18 06:40:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:03,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:03,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:03,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:03,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:03,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:03,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:03,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:03,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:03,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2022-01-18 06:40:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:04,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786088562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:04,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:04,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 06:40:04,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714392360] [2022-01-18 06:40:04,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:40:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:40:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:40:04,080 INFO L87 Difference]: Start difference. First operand 11473 states and 41466 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:11,706 INFO L93 Difference]: Finished difference Result 23033 states and 79142 transitions. [2022-01-18 06:40:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 06:40:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:11,754 INFO L225 Difference]: With dead ends: 23033 [2022-01-18 06:40:11,754 INFO L226 Difference]: Without dead ends: 22882 [2022-01-18 06:40:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2097, Invalid=14933, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 06:40:11,755 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 407 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1715 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:11,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 555 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1682 Invalid, 0 Unknown, 1715 Unchecked, 1.0s Time] [2022-01-18 06:40:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22882 states. [2022-01-18 06:40:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22882 to 11855. [2022-01-18 06:40:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11855 states, 11854 states have (on average 3.615235363590349) internal successors, (42855), 11854 states have internal predecessors, (42855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11855 states to 11855 states and 42855 transitions. [2022-01-18 06:40:12,002 INFO L78 Accepts]: Start accepts. Automaton has 11855 states and 42855 transitions. Word has length 28 [2022-01-18 06:40:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:12,002 INFO L470 AbstractCegarLoop]: Abstraction has 11855 states and 42855 transitions. [2022-01-18 06:40:12,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11855 states and 42855 transitions. [2022-01-18 06:40:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:12,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:12,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:12,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 06:40:12,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:12,221 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -382716142, now seen corresponding path program 91 times [2022-01-18 06:40:12,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:12,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154180249] [2022-01-18 06:40:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:12,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:12,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154180249] [2022-01-18 06:40:12,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154180249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054135435] [2022-01-18 06:40:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:40:12,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:12,436 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:12,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 06:40:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:12,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:12,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:12,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:40:12,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:40:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:12,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:13,115 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:13,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:13,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:13,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:13,240 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:13,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:13,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:13,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054135435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:13,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:13,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:13,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097081999] [2022-01-18 06:40:13,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:13,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:13,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:13,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:13,361 INFO L87 Difference]: Start difference. First operand 11855 states and 42855 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:14,311 INFO L93 Difference]: Finished difference Result 15729 states and 55768 transitions. [2022-01-18 06:40:14,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:40:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:14,345 INFO L225 Difference]: With dead ends: 15729 [2022-01-18 06:40:14,345 INFO L226 Difference]: Without dead ends: 15687 [2022-01-18 06:40:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 06:40:14,345 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:14,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 334 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1007 Invalid, 0 Unknown, 248 Unchecked, 0.5s Time] [2022-01-18 06:40:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15687 states. [2022-01-18 06:40:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15687 to 11828. [2022-01-18 06:40:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11828 states, 11827 states have (on average 3.6177390716157944) internal successors, (42787), 11827 states have internal predecessors, (42787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11828 states to 11828 states and 42787 transitions. [2022-01-18 06:40:14,563 INFO L78 Accepts]: Start accepts. Automaton has 11828 states and 42787 transitions. Word has length 28 [2022-01-18 06:40:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:14,563 INFO L470 AbstractCegarLoop]: Abstraction has 11828 states and 42787 transitions. [2022-01-18 06:40:14,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11828 states and 42787 transitions. [2022-01-18 06:40:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:14,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:14,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:14,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 06:40:14,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 06:40:14,783 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash -264943398, now seen corresponding path program 92 times [2022-01-18 06:40:14,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:14,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693589587] [2022-01-18 06:40:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:14,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693589587] [2022-01-18 06:40:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693589587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268261546] [2022-01-18 06:40:15,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:40:15,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:15,038 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 06:40:15,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:40:15,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:15,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:40:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:15,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:15,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:40:15,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:15,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2022-01-18 06:40:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:15,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2022-01-18 06:40:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:15,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:16,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 80 [2022-01-18 06:40:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:16,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:16,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:16,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:16,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:16,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268261546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:16,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:16,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-01-18 06:40:16,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082205019] [2022-01-18 06:40:16,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:16,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:40:16,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:40:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:40:16,473 INFO L87 Difference]: Start difference. First operand 11828 states and 42787 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:18,193 INFO L93 Difference]: Finished difference Result 17408 states and 61505 transitions. [2022-01-18 06:40:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:40:18,193 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:18,232 INFO L225 Difference]: With dead ends: 17408 [2022-01-18 06:40:18,232 INFO L226 Difference]: Without dead ends: 17370 [2022-01-18 06:40:18,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=488, Invalid=2704, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:40:18,233 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 735 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:18,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 406 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 472 Invalid, 0 Unknown, 735 Unchecked, 0.3s Time] [2022-01-18 06:40:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17370 states. [2022-01-18 06:40:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17370 to 12017. [2022-01-18 06:40:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 12016 states have (on average 3.6132656458055927) internal successors, (43417), 12016 states have internal predecessors, (43417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 43417 transitions. [2022-01-18 06:40:18,458 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 43417 transitions. Word has length 28 [2022-01-18 06:40:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:18,459 INFO L470 AbstractCegarLoop]: Abstraction has 12017 states and 43417 transitions. [2022-01-18 06:40:18,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 43417 transitions. [2022-01-18 06:40:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:18,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:18,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:18,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 06:40:18,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 06:40:18,678 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash -583789598, now seen corresponding path program 93 times [2022-01-18 06:40:18,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:18,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871729583] [2022-01-18 06:40:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:18,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:18,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871729583] [2022-01-18 06:40:18,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871729583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193416993] [2022-01-18 06:40:18,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:40:18,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:18,887 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:18,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 06:40:18,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:40:18,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:18,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:40:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:19,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:19,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:19,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 06:40:19,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:19,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 82 [2022-01-18 06:40:19,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2022-01-18 06:40:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:19,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:20,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:20,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 76 [2022-01-18 06:40:20,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:20,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:20,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 74 [2022-01-18 06:40:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:20,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193416993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:20,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-01-18 06:40:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115718602] [2022-01-18 06:40:20,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:20,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:40:20,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:40:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:40:20,588 INFO L87 Difference]: Start difference. First operand 12017 states and 43417 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:22,889 INFO L93 Difference]: Finished difference Result 17166 states and 59920 transitions. [2022-01-18 06:40:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:40:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:22,925 INFO L225 Difference]: With dead ends: 17166 [2022-01-18 06:40:22,925 INFO L226 Difference]: Without dead ends: 17105 [2022-01-18 06:40:22,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=496, Invalid=3664, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 06:40:22,926 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 278 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1410 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:22,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 434 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 750 Invalid, 0 Unknown, 1410 Unchecked, 0.4s Time] [2022-01-18 06:40:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17105 states. [2022-01-18 06:40:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17105 to 11963. [2022-01-18 06:40:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11963 states, 11962 states have (on average 3.6173716769770943) internal successors, (43271), 11962 states have internal predecessors, (43271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11963 states to 11963 states and 43271 transitions. [2022-01-18 06:40:23,151 INFO L78 Accepts]: Start accepts. Automaton has 11963 states and 43271 transitions. Word has length 28 [2022-01-18 06:40:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:23,151 INFO L470 AbstractCegarLoop]: Abstraction has 11963 states and 43271 transitions. [2022-01-18 06:40:23,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11963 states and 43271 transitions. [2022-01-18 06:40:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:23,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:23,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:23,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 06:40:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 06:40:23,370 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:23,370 INFO L85 PathProgramCache]: Analyzing trace with hash -863494902, now seen corresponding path program 94 times [2022-01-18 06:40:23,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982487637] [2022-01-18 06:40:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:23,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:23,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982487637] [2022-01-18 06:40:23,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982487637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987090146] [2022-01-18 06:40:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:40:23,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:23,565 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:23,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 06:40:23,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:40:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:23,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:23,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:40:23,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-01-18 06:40:23,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-18 06:40:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:23,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:24,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:24,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:24,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:24,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:24,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:24,211 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:24,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:24,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:24,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:24,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987090146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:24,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:40:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491031861] [2022-01-18 06:40:24,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:40:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:40:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:40:24,325 INFO L87 Difference]: Start difference. First operand 11963 states and 43271 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:26,051 INFO L93 Difference]: Finished difference Result 13981 states and 49064 transitions. [2022-01-18 06:40:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 06:40:26,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:26,086 INFO L225 Difference]: With dead ends: 13981 [2022-01-18 06:40:26,086 INFO L226 Difference]: Without dead ends: 13951 [2022-01-18 06:40:26,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:40:26,087 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 171 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:26,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 420 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:40:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2022-01-18 06:40:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 12081. [2022-01-18 06:40:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12081 states, 12080 states have (on average 3.6149834437086095) internal successors, (43669), 12080 states have internal predecessors, (43669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12081 states to 12081 states and 43669 transitions. [2022-01-18 06:40:26,289 INFO L78 Accepts]: Start accepts. Automaton has 12081 states and 43669 transitions. Word has length 28 [2022-01-18 06:40:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:26,289 INFO L470 AbstractCegarLoop]: Abstraction has 12081 states and 43669 transitions. [2022-01-18 06:40:26,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 12081 states and 43669 transitions. [2022-01-18 06:40:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:26,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:26,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:26,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 06:40:26,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 06:40:26,508 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:26,509 INFO L85 PathProgramCache]: Analyzing trace with hash -238835894, now seen corresponding path program 95 times [2022-01-18 06:40:26,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:26,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325779802] [2022-01-18 06:40:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:26,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325779802] [2022-01-18 06:40:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325779802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181130464] [2022-01-18 06:40:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:40:26,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:26,744 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:26,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 06:40:26,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:40:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:27,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:27,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 06:40:27,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 06:40:27,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-01-18 06:40:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:27,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:27,318 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:27,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:27,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:27,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:27,426 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:27,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:27,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:27,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:27,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181130464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:27,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:27,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:40:27,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237485822] [2022-01-18 06:40:27,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:27,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:40:27,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:40:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:40:27,541 INFO L87 Difference]: Start difference. First operand 12081 states and 43669 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:29,050 INFO L93 Difference]: Finished difference Result 13944 states and 48964 transitions. [2022-01-18 06:40:29,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:40:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:29,081 INFO L225 Difference]: With dead ends: 13944 [2022-01-18 06:40:29,082 INFO L226 Difference]: Without dead ends: 13839 [2022-01-18 06:40:29,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 06:40:29,082 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:29,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 499 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:40:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2022-01-18 06:40:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 12098. [2022-01-18 06:40:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12098 states, 12097 states have (on average 3.6147805240968833) internal successors, (43728), 12097 states have internal predecessors, (43728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12098 states to 12098 states and 43728 transitions. [2022-01-18 06:40:29,309 INFO L78 Accepts]: Start accepts. Automaton has 12098 states and 43728 transitions. Word has length 28 [2022-01-18 06:40:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:29,309 INFO L470 AbstractCegarLoop]: Abstraction has 12098 states and 43728 transitions. [2022-01-18 06:40:29,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12098 states and 43728 transitions. [2022-01-18 06:40:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:29,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:29,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:29,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 06:40:29,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:29,529 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2027733386, now seen corresponding path program 96 times [2022-01-18 06:40:29,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:29,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249203054] [2022-01-18 06:40:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:29,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:29,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249203054] [2022-01-18 06:40:29,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249203054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704393856] [2022-01-18 06:40:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:40:29,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:29,709 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:29,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 06:40:29,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:40:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:40:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:30,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:30,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:40:30,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:30,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-01-18 06:40:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:30,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:30,549 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:30,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:30,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:30,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:40:30,691 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:40:30,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-01-18 06:40:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:30,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704393856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:30,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:30,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 06:40:30,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645639685] [2022-01-18 06:40:30,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:30,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:40:30,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:40:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:40:30,912 INFO L87 Difference]: Start difference. First operand 12098 states and 43728 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:34,410 INFO L93 Difference]: Finished difference Result 17935 states and 62573 transitions. [2022-01-18 06:40:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:40:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:34,449 INFO L225 Difference]: With dead ends: 17935 [2022-01-18 06:40:34,449 INFO L226 Difference]: Without dead ends: 17886 [2022-01-18 06:40:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=625, Invalid=4205, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 06:40:34,450 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:34,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 839 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3546 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:40:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17886 states. [2022-01-18 06:40:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17886 to 12447. [2022-01-18 06:40:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12446 states have (on average 3.611120038566608) internal successors, (44944), 12446 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 44944 transitions. [2022-01-18 06:40:34,698 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 44944 transitions. Word has length 28 [2022-01-18 06:40:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:34,698 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 44944 transitions. [2022-01-18 06:40:34,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 44944 transitions. [2022-01-18 06:40:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:34,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:34,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:34,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 06:40:34,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 06:40:34,921 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:34,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1545588618, now seen corresponding path program 97 times [2022-01-18 06:40:34,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:34,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062962876] [2022-01-18 06:40:34,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:34,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:35,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062962876] [2022-01-18 06:40:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062962876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013393213] [2022-01-18 06:40:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:40:35,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:35,124 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:35,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 06:40:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:35,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:35,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 06:40:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:35,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:40:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:35,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:35,801 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:35,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:35,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:35,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,917 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:35,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:35,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:36,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013393213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:36,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:36,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:36,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936782909] [2022-01-18 06:40:36,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:36,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:36,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:36,028 INFO L87 Difference]: Start difference. First operand 12447 states and 44944 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:36,630 INFO L93 Difference]: Finished difference Result 15454 states and 54900 transitions. [2022-01-18 06:40:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:40:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:36,666 INFO L225 Difference]: With dead ends: 15454 [2022-01-18 06:40:36,666 INFO L226 Difference]: Without dead ends: 15429 [2022-01-18 06:40:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:40:36,666 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:36,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 351 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 317 Unchecked, 0.3s Time] [2022-01-18 06:40:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15429 states. [2022-01-18 06:40:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15429 to 12476. [2022-01-18 06:40:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12476 states, 12475 states have (on average 3.611062124248497) internal successors, (45048), 12475 states have internal predecessors, (45048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12476 states to 12476 states and 45048 transitions. [2022-01-18 06:40:36,883 INFO L78 Accepts]: Start accepts. Automaton has 12476 states and 45048 transitions. Word has length 28 [2022-01-18 06:40:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:36,883 INFO L470 AbstractCegarLoop]: Abstraction has 12476 states and 45048 transitions. [2022-01-18 06:40:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 12476 states and 45048 transitions. [2022-01-18 06:40:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:36,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:36,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:36,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 06:40:37,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:37,106 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1788059100, now seen corresponding path program 98 times [2022-01-18 06:40:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773488576] [2022-01-18 06:40:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:37,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:37,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773488576] [2022-01-18 06:40:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773488576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39048222] [2022-01-18 06:40:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:40:37,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:37,297 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:37,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 06:40:37,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:40:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:37,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:37,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:37,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:40:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:37,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:37,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:40:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:37,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:37,910 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:37,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:37,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:37,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:37,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:37,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:38,011 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:38,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:38,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:38,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:38,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:38,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39048222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:38,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341327051] [2022-01-18 06:40:38,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:38,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:38,128 INFO L87 Difference]: Start difference. First operand 12476 states and 45048 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:38,807 INFO L93 Difference]: Finished difference Result 15674 states and 55504 transitions. [2022-01-18 06:40:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:40:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:38,842 INFO L225 Difference]: With dead ends: 15674 [2022-01-18 06:40:38,842 INFO L226 Difference]: Without dead ends: 15649 [2022-01-18 06:40:38,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:40:38,842 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:38,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 360 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 685 Invalid, 0 Unknown, 274 Unchecked, 0.3s Time] [2022-01-18 06:40:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15649 states. [2022-01-18 06:40:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15649 to 12525. [2022-01-18 06:40:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12525 states, 12524 states have (on average 3.6096295113382304) internal successors, (45207), 12524 states have internal predecessors, (45207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12525 states to 12525 states and 45207 transitions. [2022-01-18 06:40:39,060 INFO L78 Accepts]: Start accepts. Automaton has 12525 states and 45207 transitions. Word has length 28 [2022-01-18 06:40:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:39,060 INFO L470 AbstractCegarLoop]: Abstraction has 12525 states and 45207 transitions. [2022-01-18 06:40:39,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 12525 states and 45207 transitions. [2022-01-18 06:40:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:39,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:39,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 06:40:39,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:39,281 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 99553010, now seen corresponding path program 99 times [2022-01-18 06:40:39,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:39,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674979260] [2022-01-18 06:40:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:39,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:39,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674979260] [2022-01-18 06:40:39,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674979260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:39,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196331980] [2022-01-18 06:40:39,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:40:39,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:39,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:39,514 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:39,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 06:40:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:40:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:40:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:39,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 06:40:39,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 06:40:39,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:39,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-01-18 06:40:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:39,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:40,151 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:40,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:40,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:40,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:40,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:40,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:40,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:40,264 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:40,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:40,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:40,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196331980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:40,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:40,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:40,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549917957] [2022-01-18 06:40:40,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:40,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:40,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:40,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:40,387 INFO L87 Difference]: Start difference. First operand 12525 states and 45207 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:40,680 INFO L93 Difference]: Finished difference Result 12947 states and 46353 transitions. [2022-01-18 06:40:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:40:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:40,708 INFO L225 Difference]: With dead ends: 12947 [2022-01-18 06:40:40,708 INFO L226 Difference]: Without dead ends: 12944 [2022-01-18 06:40:40,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:40:40,708 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 70 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:40,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 426 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-18 06:40:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12944 states. [2022-01-18 06:40:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12944 to 12539. [2022-01-18 06:40:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12539 states, 12538 states have (on average 3.60894879566119) internal successors, (45249), 12538 states have internal predecessors, (45249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 45249 transitions. [2022-01-18 06:40:40,911 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 45249 transitions. Word has length 28 [2022-01-18 06:40:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:40,911 INFO L470 AbstractCegarLoop]: Abstraction has 12539 states and 45249 transitions. [2022-01-18 06:40:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 45249 transitions. [2022-01-18 06:40:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:40,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:40,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:40,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 06:40:41,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:41,133 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash 96927234, now seen corresponding path program 100 times [2022-01-18 06:40:41,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847224943] [2022-01-18 06:40:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:41,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:41,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847224943] [2022-01-18 06:40:41,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847224943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284037806] [2022-01-18 06:40:41,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:40:41,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:41,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:41,329 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:41,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 06:40:41,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:40:41,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:41,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:41,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:40:41,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:41,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:41,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:40:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:41,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:41,975 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:41,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:42,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:42,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:42,078 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:42,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:42,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:42,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284037806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:42,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:42,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:42,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595773439] [2022-01-18 06:40:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:42,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:42,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:42,200 INFO L87 Difference]: Start difference. First operand 12539 states and 45249 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:42,863 INFO L93 Difference]: Finished difference Result 15585 states and 55320 transitions. [2022-01-18 06:40:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:40:42,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:42,896 INFO L225 Difference]: With dead ends: 15585 [2022-01-18 06:40:42,896 INFO L226 Difference]: Without dead ends: 15560 [2022-01-18 06:40:42,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:40:42,896 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 711 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-01-18 06:40:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2022-01-18 06:40:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 12533. [2022-01-18 06:40:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12533 states, 12532 states have (on average 3.608203000319183) internal successors, (45218), 12532 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12533 states to 12533 states and 45218 transitions. [2022-01-18 06:40:43,199 INFO L78 Accepts]: Start accepts. Automaton has 12533 states and 45218 transitions. Word has length 28 [2022-01-18 06:40:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:43,200 INFO L470 AbstractCegarLoop]: Abstraction has 12533 states and 45218 transitions. [2022-01-18 06:40:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12533 states and 45218 transitions. [2022-01-18 06:40:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:43,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:43,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:43,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 06:40:43,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-18 06:40:43,419 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1446684146, now seen corresponding path program 101 times [2022-01-18 06:40:43,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990688278] [2022-01-18 06:40:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:43,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:43,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990688278] [2022-01-18 06:40:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990688278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492699922] [2022-01-18 06:40:43,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:40:43,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:43,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:43,613 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:43,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 06:40:43,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:40:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:43,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:44,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 06:40:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:44,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:40:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:44,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:44,269 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:44,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:44,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:44,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,381 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:44,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:44,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:44,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:44,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492699922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:44,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:44,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:40:44,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42137213] [2022-01-18 06:40:44,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:44,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:40:44,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:40:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:40:44,513 INFO L87 Difference]: Start difference. First operand 12533 states and 45218 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:45,071 INFO L93 Difference]: Finished difference Result 15484 states and 55042 transitions. [2022-01-18 06:40:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:40:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:45,109 INFO L225 Difference]: With dead ends: 15484 [2022-01-18 06:40:45,109 INFO L226 Difference]: Without dead ends: 15373 [2022-01-18 06:40:45,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:40:45,110 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:45,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 280 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 382 Unchecked, 0.3s Time] [2022-01-18 06:40:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15373 states. [2022-01-18 06:40:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15373 to 12642. [2022-01-18 06:40:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12642 states, 12641 states have (on average 3.6035914880151885) internal successors, (45553), 12641 states have internal predecessors, (45553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 45553 transitions. [2022-01-18 06:40:45,342 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 45553 transitions. Word has length 28 [2022-01-18 06:40:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:45,342 INFO L470 AbstractCegarLoop]: Abstraction has 12642 states and 45553 transitions. [2022-01-18 06:40:45,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 45553 transitions. [2022-01-18 06:40:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:45,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:45,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:45,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 06:40:45,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:45,564 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -378809582, now seen corresponding path program 102 times [2022-01-18 06:40:45,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249230551] [2022-01-18 06:40:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:45,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:45,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:45,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249230551] [2022-01-18 06:40:45,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249230551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:45,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957524717] [2022-01-18 06:40:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:40:45,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:45,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:45,789 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:45,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 06:40:45,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:40:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:40:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:46,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:40:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:46,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:46,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 06:40:46,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-01-18 06:40:46,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:46,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 63 [2022-01-18 06:40:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:46,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:47,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:47,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:47,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-01-18 06:40:47,267 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:40:47,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 70 [2022-01-18 06:40:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:47,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957524717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:47,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:47,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:40:47,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092622720] [2022-01-18 06:40:47,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:47,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:40:47,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:40:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:40:47,590 INFO L87 Difference]: Start difference. First operand 12642 states and 45553 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:50,436 INFO L93 Difference]: Finished difference Result 21374 states and 74964 transitions. [2022-01-18 06:40:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 06:40:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:50,483 INFO L225 Difference]: With dead ends: 21374 [2022-01-18 06:40:50,483 INFO L226 Difference]: Without dead ends: 21344 [2022-01-18 06:40:50,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=751, Invalid=4799, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:40:50,484 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 282 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1368 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:50,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 517 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 886 Invalid, 0 Unknown, 1368 Unchecked, 0.5s Time] [2022-01-18 06:40:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21344 states. [2022-01-18 06:40:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21344 to 12660. [2022-01-18 06:40:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.602417252547595) internal successors, (45603), 12659 states have internal predecessors, (45603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45603 transitions. [2022-01-18 06:40:50,750 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45603 transitions. Word has length 28 [2022-01-18 06:40:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:50,750 INFO L470 AbstractCegarLoop]: Abstraction has 12660 states and 45603 transitions. [2022-01-18 06:40:50,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45603 transitions. [2022-01-18 06:40:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:50,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:50,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:50,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 06:40:50,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:50,971 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 714160914, now seen corresponding path program 103 times [2022-01-18 06:40:50,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087106212] [2022-01-18 06:40:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:50,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:51,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087106212] [2022-01-18 06:40:51,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087106212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40268628] [2022-01-18 06:40:51,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:40:51,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:51,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:51,176 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:51,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 06:40:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:51,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:51,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:40:51,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:40:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:51,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:51,754 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:51,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:51,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:40:51,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,852 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:51,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:40:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:51,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:51,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:51,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40268628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:51,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:51,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:40:51,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468477784] [2022-01-18 06:40:51,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:51,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:40:51,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:40:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:40:51,969 INFO L87 Difference]: Start difference. First operand 12660 states and 45603 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:52,733 INFO L93 Difference]: Finished difference Result 15695 states and 55675 transitions. [2022-01-18 06:40:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 06:40:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:52,837 INFO L225 Difference]: With dead ends: 15695 [2022-01-18 06:40:52,837 INFO L226 Difference]: Without dead ends: 15656 [2022-01-18 06:40:52,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:40:52,837 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:52,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1063 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-01-18 06:40:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15656 states. [2022-01-18 06:40:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15656 to 12707. [2022-01-18 06:40:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12707 states, 12706 states have (on average 3.6011333228396034) internal successors, (45756), 12706 states have internal predecessors, (45756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12707 states to 12707 states and 45756 transitions. [2022-01-18 06:40:53,033 INFO L78 Accepts]: Start accepts. Automaton has 12707 states and 45756 transitions. Word has length 28 [2022-01-18 06:40:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:53,034 INFO L470 AbstractCegarLoop]: Abstraction has 12707 states and 45756 transitions. [2022-01-18 06:40:53,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 12707 states and 45756 transitions. [2022-01-18 06:40:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:53,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:53,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:53,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 06:40:53,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 06:40:53,255 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1286557074, now seen corresponding path program 104 times [2022-01-18 06:40:53,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:53,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056893406] [2022-01-18 06:40:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:53,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:53,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056893406] [2022-01-18 06:40:53,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056893406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110820607] [2022-01-18 06:40:53,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:40:53,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:53,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:53,492 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:53,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 06:40:53,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:40:53,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:40:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:53,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:53,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 06:40:53,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:40:53,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-18 06:40:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:54,017 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:40:54,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:40:54,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:54,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:54,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:40:54,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:54,132 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:54,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:40:54,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:54,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:54,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:40:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:54,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110820607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:54,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:54,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:40:54,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305967350] [2022-01-18 06:40:54,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:54,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:40:54,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:40:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:40:54,252 INFO L87 Difference]: Start difference. First operand 12707 states and 45756 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:40:54,731 INFO L93 Difference]: Finished difference Result 12916 states and 46277 transitions. [2022-01-18 06:40:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:40:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:40:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:40:54,759 INFO L225 Difference]: With dead ends: 12916 [2022-01-18 06:40:54,759 INFO L226 Difference]: Without dead ends: 12890 [2022-01-18 06:40:54,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:40:54,759 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 108 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:40:54,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 300 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 924 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-01-18 06:40:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2022-01-18 06:40:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12746. [2022-01-18 06:40:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12746 states, 12745 states have (on average 3.6000784621420165) internal successors, (45883), 12745 states have internal predecessors, (45883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12746 states to 12746 states and 45883 transitions. [2022-01-18 06:40:54,957 INFO L78 Accepts]: Start accepts. Automaton has 12746 states and 45883 transitions. Word has length 28 [2022-01-18 06:40:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:40:54,957 INFO L470 AbstractCegarLoop]: Abstraction has 12746 states and 45883 transitions. [2022-01-18 06:40:54,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:40:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12746 states and 45883 transitions. [2022-01-18 06:40:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:40:54,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:40:54,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:40:54,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 06:40:55,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 06:40:55,180 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:40:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:40:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash 846539570, now seen corresponding path program 105 times [2022-01-18 06:40:55,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:40:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336989280] [2022-01-18 06:40:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:40:55,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:40:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:40:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:55,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:40:55,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336989280] [2022-01-18 06:40:55,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336989280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:40:55,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573228837] [2022-01-18 06:40:55,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:40:55,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:40:55,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:40:55,445 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:40:55,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 06:40:55,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:40:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:40:55,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:40:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:40:55,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:40:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:55,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:55,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:55,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-18 06:40:55,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-18 06:40:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:55,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:55,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-01-18 06:40:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:56,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:40:56,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:56,582 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:40:56,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 81 [2022-01-18 06:40:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:40:56,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:40:56,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:40:56,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-01-18 06:40:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:40:56,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573228837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:40:56,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:40:56,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-18 06:40:56,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511955300] [2022-01-18 06:40:56,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:40:56,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 06:40:56,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:40:56,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 06:40:56,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:40:56,930 INFO L87 Difference]: Start difference. First operand 12746 states and 45883 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:00,557 INFO L93 Difference]: Finished difference Result 21962 states and 76540 transitions. [2022-01-18 06:41:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 06:41:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:00,606 INFO L225 Difference]: With dead ends: 21962 [2022-01-18 06:41:00,606 INFO L226 Difference]: Without dead ends: 21922 [2022-01-18 06:41:00,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=705, Invalid=5301, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 06:41:00,607 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 352 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 2910 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:00,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 618 Invalid, 3739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2910 Invalid, 0 Unknown, 739 Unchecked, 1.3s Time] [2022-01-18 06:41:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21922 states. [2022-01-18 06:41:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21922 to 12766. [2022-01-18 06:41:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.5993732863298082) internal successors, (45946), 12765 states have internal predecessors, (45946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45946 transitions. [2022-01-18 06:41:00,895 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45946 transitions. Word has length 28 [2022-01-18 06:41:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:00,896 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45946 transitions. [2022-01-18 06:41:00,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45946 transitions. [2022-01-18 06:41:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:00,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:00,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:00,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:01,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 06:41:01,117 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:01,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1094093886, now seen corresponding path program 106 times [2022-01-18 06:41:01,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:01,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437346700] [2022-01-18 06:41:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:01,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:01,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437346700] [2022-01-18 06:41:01,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437346700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:01,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90492748] [2022-01-18 06:41:01,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:41:01,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:01,363 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:01,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 06:41:01,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:41:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:01,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:01,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:01,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-01-18 06:41:01,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-01-18 06:41:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:01,894 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:01,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:01,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:01,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:01,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:01,995 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:01,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:02,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:02,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90492748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:02,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:02,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:41:02,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065848382] [2022-01-18 06:41:02,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:02,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:41:02,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:41:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:02,116 INFO L87 Difference]: Start difference. First operand 12766 states and 45946 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:03,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:03,058 INFO L93 Difference]: Finished difference Result 15546 states and 55206 transitions. [2022-01-18 06:41:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:41:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:03,091 INFO L225 Difference]: With dead ends: 15546 [2022-01-18 06:41:03,091 INFO L226 Difference]: Without dead ends: 15536 [2022-01-18 06:41:03,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:41:03,091 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:03,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 300 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 06:41:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2022-01-18 06:41:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 12722. [2022-01-18 06:41:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12722 states, 12721 states have (on average 3.6019966983727696) internal successors, (45821), 12721 states have internal predecessors, (45821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12722 states to 12722 states and 45821 transitions. [2022-01-18 06:41:03,308 INFO L78 Accepts]: Start accepts. Automaton has 12722 states and 45821 transitions. Word has length 28 [2022-01-18 06:41:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:03,308 INFO L470 AbstractCegarLoop]: Abstraction has 12722 states and 45821 transitions. [2022-01-18 06:41:03,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12722 states and 45821 transitions. [2022-01-18 06:41:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:03,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:03,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:03,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 06:41:03,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:03,531 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1390021678, now seen corresponding path program 107 times [2022-01-18 06:41:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:03,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864446880] [2022-01-18 06:41:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:03,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:03,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864446880] [2022-01-18 06:41:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864446880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518927161] [2022-01-18 06:41:03,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:41:03,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:03,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:03,767 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 06:41:03,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:41:03,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:03,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:04,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:04,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:41:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:41:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:04,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:04,430 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:04,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:04,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:04,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,519 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:04,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:04,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:04,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518927161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:04,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:04,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:04,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665445117] [2022-01-18 06:41:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:04,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:04,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:04,646 INFO L87 Difference]: Start difference. First operand 12722 states and 45821 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:05,218 INFO L93 Difference]: Finished difference Result 15516 states and 55159 transitions. [2022-01-18 06:41:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:41:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:05,251 INFO L225 Difference]: With dead ends: 15516 [2022-01-18 06:41:05,251 INFO L226 Difference]: Without dead ends: 15402 [2022-01-18 06:41:05,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:41:05,252 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 198 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 685 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-01-18 06:41:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15402 states. [2022-01-18 06:41:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15402 to 12766. [2022-01-18 06:41:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12766 states, 12765 states have (on average 3.599294947121034) internal successors, (45945), 12765 states have internal predecessors, (45945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12766 states to 12766 states and 45945 transitions. [2022-01-18 06:41:05,466 INFO L78 Accepts]: Start accepts. Automaton has 12766 states and 45945 transitions. Word has length 28 [2022-01-18 06:41:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:05,466 INFO L470 AbstractCegarLoop]: Abstraction has 12766 states and 45945 transitions. [2022-01-18 06:41:05,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12766 states and 45945 transitions. [2022-01-18 06:41:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:05,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:05,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:05,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 06:41:05,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 06:41:05,699 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash -261021852, now seen corresponding path program 108 times [2022-01-18 06:41:05,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:05,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896798963] [2022-01-18 06:41:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:05,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896798963] [2022-01-18 06:41:05,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896798963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721073399] [2022-01-18 06:41:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:41:05,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:05,917 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:05,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 06:41:05,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:41:05,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:06,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:06,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 06:41:06,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:06,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:41:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:06,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:06,618 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:06,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:06,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:06,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:06,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,727 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:06,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:06,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:06,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721073399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:06,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:06,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:06,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517929924] [2022-01-18 06:41:06,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:06,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:06,839 INFO L87 Difference]: Start difference. First operand 12766 states and 45945 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:07,216 INFO L93 Difference]: Finished difference Result 12892 states and 46275 transitions. [2022-01-18 06:41:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:41:07,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:07,243 INFO L225 Difference]: With dead ends: 12892 [2022-01-18 06:41:07,243 INFO L226 Difference]: Without dead ends: 12835 [2022-01-18 06:41:07,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:41:07,244 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:07,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 135 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 450 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 06:41:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2022-01-18 06:41:07,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12771. [2022-01-18 06:41:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 3.6) internal successors, (45972), 12770 states have internal predecessors, (45972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 45972 transitions. [2022-01-18 06:41:07,442 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 45972 transitions. Word has length 28 [2022-01-18 06:41:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:07,442 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 45972 transitions. [2022-01-18 06:41:07,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 45972 transitions. [2022-01-18 06:41:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:07,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:07,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:07,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:07,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 06:41:07,664 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash 927005792, now seen corresponding path program 109 times [2022-01-18 06:41:07,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767007989] [2022-01-18 06:41:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:07,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:07,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:07,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767007989] [2022-01-18 06:41:07,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767007989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:07,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799365128] [2022-01-18 06:41:07,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:41:07,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:07,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:07,910 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:07,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 06:41:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:08,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:08,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:41:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:08,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:41:08,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:41:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:08,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:08,583 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:08,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:08,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,700 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:08,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:08,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:08,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799365128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:08,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:08,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:08,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027336481] [2022-01-18 06:41:08,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:08,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:08,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:08,832 INFO L87 Difference]: Start difference. First operand 12771 states and 45972 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:09,402 INFO L93 Difference]: Finished difference Result 15517 states and 55172 transitions. [2022-01-18 06:41:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 06:41:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:09,438 INFO L225 Difference]: With dead ends: 15517 [2022-01-18 06:41:09,438 INFO L226 Difference]: Without dead ends: 15390 [2022-01-18 06:41:09,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:41:09,438 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:09,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 175 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 624 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-01-18 06:41:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2022-01-18 06:41:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 12763. [2022-01-18 06:41:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12763 states, 12762 states have (on average 3.600376116596145) internal successors, (45948), 12762 states have internal predecessors, (45948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12763 states to 12763 states and 45948 transitions. [2022-01-18 06:41:09,787 INFO L78 Accepts]: Start accepts. Automaton has 12763 states and 45948 transitions. Word has length 28 [2022-01-18 06:41:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:09,787 INFO L470 AbstractCegarLoop]: Abstraction has 12763 states and 45948 transitions. [2022-01-18 06:41:09,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12763 states and 45948 transitions. [2022-01-18 06:41:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:09,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:09,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:09,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:10,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 06:41:10,010 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash 130437102, now seen corresponding path program 110 times [2022-01-18 06:41:10,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:10,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464028930] [2022-01-18 06:41:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:10,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:10,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464028930] [2022-01-18 06:41:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464028930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277143234] [2022-01-18 06:41:10,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:41:10,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:10,211 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 06:41:10,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:41:10,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:10,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:10,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:10,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:41:10,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-18 06:41:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:10,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 06:41:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:10,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:10,764 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:10,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:10,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:10,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,863 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:10,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:10,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:10,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:10,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277143234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:10,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:10,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:10,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119681953] [2022-01-18 06:41:10,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:10,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:10,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:10,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:10,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:10,978 INFO L87 Difference]: Start difference. First operand 12763 states and 45948 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:11,476 INFO L93 Difference]: Finished difference Result 13020 states and 46636 transitions. [2022-01-18 06:41:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:41:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:11,507 INFO L225 Difference]: With dead ends: 13020 [2022-01-18 06:41:11,507 INFO L226 Difference]: Without dead ends: 13005 [2022-01-18 06:41:11,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:11,508 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:11,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 228 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:41:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13005 states. [2022-01-18 06:41:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13005 to 12778. [2022-01-18 06:41:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 3.600219143773969) internal successors, (46000), 12777 states have internal predecessors, (46000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 46000 transitions. [2022-01-18 06:41:11,710 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 46000 transitions. Word has length 28 [2022-01-18 06:41:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:11,710 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 46000 transitions. [2022-01-18 06:41:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 46000 transitions. [2022-01-18 06:41:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:11,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:11,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:11,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 06:41:11,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 06:41:11,932 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1117928714, now seen corresponding path program 111 times [2022-01-18 06:41:11,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:11,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494223441] [2022-01-18 06:41:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:11,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:12,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494223441] [2022-01-18 06:41:12,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494223441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448573311] [2022-01-18 06:41:12,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:41:12,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:12,144 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:12,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 06:41:12,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:41:12,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:12,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-18 06:41:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:12,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:12,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:41:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:12,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:12,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2022-01-18 06:41:12,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:12,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 85 [2022-01-18 06:41:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:13,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:14,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:14,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 89 [2022-01-18 06:41:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:14,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:14,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 63 [2022-01-18 06:41:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448573311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:14,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:14,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-01-18 06:41:14,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664488008] [2022-01-18 06:41:14,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:14,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 06:41:14,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 06:41:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:41:14,824 INFO L87 Difference]: Start difference. First operand 12778 states and 46000 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:20,518 INFO L93 Difference]: Finished difference Result 24537 states and 86650 transitions. [2022-01-18 06:41:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 06:41:20,519 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:20,575 INFO L225 Difference]: With dead ends: 24537 [2022-01-18 06:41:20,575 INFO L226 Difference]: Without dead ends: 24488 [2022-01-18 06:41:20,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1193, Invalid=7737, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 06:41:20,576 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 302 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1883 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:20,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 479 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1537 Invalid, 0 Unknown, 1883 Unchecked, 0.8s Time] [2022-01-18 06:41:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24488 states. [2022-01-18 06:41:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24488 to 12960. [2022-01-18 06:41:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.6002777992129023) internal successors, (46656), 12959 states have internal predecessors, (46656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46656 transitions. [2022-01-18 06:41:20,961 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46656 transitions. Word has length 28 [2022-01-18 06:41:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:20,962 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46656 transitions. [2022-01-18 06:41:20,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46656 transitions. [2022-01-18 06:41:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:20,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:20,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:20,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:21,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:21,185 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1141828628, now seen corresponding path program 112 times [2022-01-18 06:41:21,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:21,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668505062] [2022-01-18 06:41:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:21,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:21,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668505062] [2022-01-18 06:41:21,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668505062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358598584] [2022-01-18 06:41:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:41:21,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:21,389 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:21,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 06:41:21,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:41:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:21,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:21,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:21,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:41:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:21,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:21,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-01-18 06:41:21,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:41:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:21,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:21,929 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:21,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:21,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:41:22,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:22,039 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:22,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:41:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:22,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:22,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358598584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:22,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:22,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:41:22,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656801160] [2022-01-18 06:41:22,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:22,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:41:22,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:41:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:22,154 INFO L87 Difference]: Start difference. First operand 12960 states and 46656 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:22,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:22,573 INFO L93 Difference]: Finished difference Result 13228 states and 47355 transitions. [2022-01-18 06:41:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:41:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:22,605 INFO L225 Difference]: With dead ends: 13228 [2022-01-18 06:41:22,605 INFO L226 Difference]: Without dead ends: 13203 [2022-01-18 06:41:22,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:41:22,605 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:22,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 168 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:41:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13203 states. [2022-01-18 06:41:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13203 to 12925. [2022-01-18 06:41:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12925 states, 12924 states have (on average 3.6012844320643764) internal successors, (46543), 12924 states have internal predecessors, (46543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12925 states to 12925 states and 46543 transitions. [2022-01-18 06:41:22,831 INFO L78 Accepts]: Start accepts. Automaton has 12925 states and 46543 transitions. Word has length 28 [2022-01-18 06:41:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 12925 states and 46543 transitions. [2022-01-18 06:41:22,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12925 states and 46543 transitions. [2022-01-18 06:41:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:22,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:22,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:22,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 06:41:23,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:23,059 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash 938600134, now seen corresponding path program 113 times [2022-01-18 06:41:23,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470238961] [2022-01-18 06:41:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:23,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:23,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:23,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470238961] [2022-01-18 06:41:23,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470238961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:23,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815452861] [2022-01-18 06:41:23,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:41:23,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:23,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:23,255 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:23,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 06:41:23,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:41:23,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:41:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:23,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:23,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:41:23,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-01-18 06:41:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:23,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:23,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-01-18 06:41:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:23,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:23,894 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:23,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:23,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:24,010 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:24,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:24,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:24,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815452861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:24,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:24,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:24,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995839786] [2022-01-18 06:41:24,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:24,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:24,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:24,143 INFO L87 Difference]: Start difference. First operand 12925 states and 46543 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:24,879 INFO L93 Difference]: Finished difference Result 16208 states and 57298 transitions. [2022-01-18 06:41:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:41:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:24,915 INFO L225 Difference]: With dead ends: 16208 [2022-01-18 06:41:24,915 INFO L226 Difference]: Without dead ends: 16183 [2022-01-18 06:41:24,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:41:24,916 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 96 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:24,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 343 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 229 Unchecked, 0.3s Time] [2022-01-18 06:41:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16183 states. [2022-01-18 06:41:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16183 to 12943. [2022-01-18 06:41:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 3.600216349868645) internal successors, (46594), 12942 states have internal predecessors, (46594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 46594 transitions. [2022-01-18 06:41:25,212 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 46594 transitions. Word has length 28 [2022-01-18 06:41:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:25,212 INFO L470 AbstractCegarLoop]: Abstraction has 12943 states and 46594 transitions. [2022-01-18 06:41:25,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 46594 transitions. [2022-01-18 06:41:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:25,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:25,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:25,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 06:41:25,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 06:41:25,436 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2009236406, now seen corresponding path program 114 times [2022-01-18 06:41:25,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:25,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194237962] [2022-01-18 06:41:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:25,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:25,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194237962] [2022-01-18 06:41:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194237962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665387565] [2022-01-18 06:41:25,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:41:25,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:25,630 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 06:41:25,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:41:25,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:25,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:26,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:41:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:41:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:26,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:26,232 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:26,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:26,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:26,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:26,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,328 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:26,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:26,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:26,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:26,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665387565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:26,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:26,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:26,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354998889] [2022-01-18 06:41:26,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:26,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:26,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:26,455 INFO L87 Difference]: Start difference. First operand 12943 states and 46594 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:27,214 INFO L93 Difference]: Finished difference Result 16199 states and 57265 transitions. [2022-01-18 06:41:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 06:41:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:27,251 INFO L225 Difference]: With dead ends: 16199 [2022-01-18 06:41:27,252 INFO L226 Difference]: Without dead ends: 16174 [2022-01-18 06:41:27,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:41:27,252 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:27,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 396 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 807 Invalid, 0 Unknown, 398 Unchecked, 0.4s Time] [2022-01-18 06:41:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2022-01-18 06:41:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 12970. [2022-01-18 06:41:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12970 states, 12969 states have (on average 3.597733055748323) internal successors, (46659), 12969 states have internal predecessors, (46659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12970 states to 12970 states and 46659 transitions. [2022-01-18 06:41:27,499 INFO L78 Accepts]: Start accepts. Automaton has 12970 states and 46659 transitions. Word has length 28 [2022-01-18 06:41:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:27,499 INFO L470 AbstractCegarLoop]: Abstraction has 12970 states and 46659 transitions. [2022-01-18 06:41:27,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12970 states and 46659 transitions. [2022-01-18 06:41:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:27,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:27,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:27,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 06:41:27,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 06:41:27,746 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:27,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1701544062, now seen corresponding path program 115 times [2022-01-18 06:41:27,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:27,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478380493] [2022-01-18 06:41:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:27,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:27,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:27,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478380493] [2022-01-18 06:41:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478380493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:27,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523098578] [2022-01-18 06:41:27,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:41:27,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:27,980 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:28,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 06:41:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:28,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:28,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 06:41:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:28,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 06:41:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:28,652 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:28,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:28,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:28,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:28,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,812 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:28,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:28,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:28,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:28,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523098578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:28,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:28,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:28,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350846712] [2022-01-18 06:41:28,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:28,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:28,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:28,938 INFO L87 Difference]: Start difference. First operand 12970 states and 46659 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:29,693 INFO L93 Difference]: Finished difference Result 16065 states and 56911 transitions. [2022-01-18 06:41:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:41:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:29,729 INFO L225 Difference]: With dead ends: 16065 [2022-01-18 06:41:29,729 INFO L226 Difference]: Without dead ends: 16056 [2022-01-18 06:41:29,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:41:29,730 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:29,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 371 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 732 Invalid, 0 Unknown, 363 Unchecked, 0.3s Time] [2022-01-18 06:41:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2022-01-18 06:41:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 12938. [2022-01-18 06:41:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.599907242791992) internal successors, (46572), 12937 states have internal predecessors, (46572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 46572 transitions. [2022-01-18 06:41:29,988 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 46572 transitions. Word has length 28 [2022-01-18 06:41:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:29,988 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 46572 transitions. [2022-01-18 06:41:29,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 46572 transitions. [2022-01-18 06:41:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:30,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:30,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:30,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 06:41:30,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 06:41:30,210 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash 107172430, now seen corresponding path program 116 times [2022-01-18 06:41:30,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:30,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742869679] [2022-01-18 06:41:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:30,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:30,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:30,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742869679] [2022-01-18 06:41:30,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742869679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:30,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727167376] [2022-01-18 06:41:30,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:41:30,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:30,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:30,405 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:30,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 06:41:30,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:41:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:30,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:30,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:41:30,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:30,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:30,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-01-18 06:41:30,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:41:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:30,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:30,990 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:30,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:31,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:31,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:31,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:41:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:31,087 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:31,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:41:31,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:31,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:31,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:31,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727167376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:31,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:31,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:41:31,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009544825] [2022-01-18 06:41:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:31,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:41:31,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:41:31,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:31,201 INFO L87 Difference]: Start difference. First operand 12938 states and 46572 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:31,890 INFO L93 Difference]: Finished difference Result 15989 states and 56727 transitions. [2022-01-18 06:41:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:41:31,890 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:31,926 INFO L225 Difference]: With dead ends: 15989 [2022-01-18 06:41:31,927 INFO L226 Difference]: Without dead ends: 15964 [2022-01-18 06:41:31,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:41:31,927 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 297 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 825 Invalid, 0 Unknown, 210 Unchecked, 0.4s Time] [2022-01-18 06:41:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15964 states. [2022-01-18 06:41:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15964 to 12928. [2022-01-18 06:41:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12928 states, 12927 states have (on average 3.6002939583816818) internal successors, (46541), 12927 states have internal predecessors, (46541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12928 states to 12928 states and 46541 transitions. [2022-01-18 06:41:32,149 INFO L78 Accepts]: Start accepts. Automaton has 12928 states and 46541 transitions. Word has length 28 [2022-01-18 06:41:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:32,149 INFO L470 AbstractCegarLoop]: Abstraction has 12928 states and 46541 transitions. [2022-01-18 06:41:32,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 12928 states and 46541 transitions. [2022-01-18 06:41:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:32,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:32,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:32,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 06:41:32,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 06:41:32,371 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1755677898, now seen corresponding path program 117 times [2022-01-18 06:41:32,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:32,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553850662] [2022-01-18 06:41:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:32,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:32,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:32,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553850662] [2022-01-18 06:41:32,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553850662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:32,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481368095] [2022-01-18 06:41:32,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:41:32,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:32,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:32,594 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:32,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 06:41:32,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:41:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:32,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-18 06:41:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:32,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:33,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:33,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:33,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-01-18 06:41:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:33,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:33,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-18 06:41:33,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-01-18 06:41:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:33,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:33,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 06:41:33,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-01-18 06:41:33,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:33,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-18 06:41:33,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 06:41:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:34,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481368095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:34,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:34,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-01-18 06:41:34,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257694154] [2022-01-18 06:41:34,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:34,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 06:41:34,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 06:41:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:41:34,035 INFO L87 Difference]: Start difference. First operand 12928 states and 46541 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:37,626 INFO L93 Difference]: Finished difference Result 27708 states and 96022 transitions. [2022-01-18 06:41:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 06:41:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:37,703 INFO L225 Difference]: With dead ends: 27708 [2022-01-18 06:41:37,703 INFO L226 Difference]: Without dead ends: 27582 [2022-01-18 06:41:37,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1289, Invalid=8413, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 06:41:37,704 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 284 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:37,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 582 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1154 Invalid, 0 Unknown, 1294 Unchecked, 0.6s Time] [2022-01-18 06:41:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2022-01-18 06:41:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 12960. [2022-01-18 06:41:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 3.598888803148391) internal successors, (46638), 12959 states have internal predecessors, (46638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 46638 transitions. [2022-01-18 06:41:38,052 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 46638 transitions. Word has length 28 [2022-01-18 06:41:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:38,052 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 46638 transitions. [2022-01-18 06:41:38,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 46638 transitions. [2022-01-18 06:41:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:38,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:38,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:38,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 06:41:38,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 06:41:38,276 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1587868806, now seen corresponding path program 118 times [2022-01-18 06:41:38,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433069730] [2022-01-18 06:41:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:38,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:38,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433069730] [2022-01-18 06:41:38,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433069730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632204578] [2022-01-18 06:41:38,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:41:38,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:38,494 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:38,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 06:41:38,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:41:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:38,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:38,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:38,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:41:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:38,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 06:41:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:38,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:39,095 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:39,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:39,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:39,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:41:39,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:39,197 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:39,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:41:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:39,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:39,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632204578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:39,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:39,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:41:39,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68862131] [2022-01-18 06:41:39,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:39,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:41:39,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:41:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:39,323 INFO L87 Difference]: Start difference. First operand 12960 states and 46638 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:40,164 INFO L93 Difference]: Finished difference Result 16858 states and 59788 transitions. [2022-01-18 06:41:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:41:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:40,199 INFO L225 Difference]: With dead ends: 16858 [2022-01-18 06:41:40,199 INFO L226 Difference]: Without dead ends: 16772 [2022-01-18 06:41:40,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:41:40,199 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:40,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 180 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 663 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-01-18 06:41:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16772 states. [2022-01-18 06:41:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16772 to 12965. [2022-01-18 06:41:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.5990435050910214) internal successors, (46658), 12964 states have internal predecessors, (46658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 46658 transitions. [2022-01-18 06:41:40,420 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 46658 transitions. Word has length 28 [2022-01-18 06:41:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:40,420 INFO L470 AbstractCegarLoop]: Abstraction has 12965 states and 46658 transitions. [2022-01-18 06:41:40,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 46658 transitions. [2022-01-18 06:41:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:40,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:40,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:40,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 06:41:40,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 06:41:40,643 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:40,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1332985644, now seen corresponding path program 119 times [2022-01-18 06:41:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:40,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074471796] [2022-01-18 06:41:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:40,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:40,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:40,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074471796] [2022-01-18 06:41:40,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074471796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:40,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105376] [2022-01-18 06:41:40,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:41:40,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:40,863 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:40,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 06:41:40,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:41:40,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:41,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:41:41,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:41:41,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:41:41,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-01-18 06:41:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:41,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:41,519 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:41,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:41,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:41:41,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,630 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:41,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:41:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:41,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:41,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:41,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:41,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:41:41,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570769114] [2022-01-18 06:41:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:41:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:41:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:41:41,742 INFO L87 Difference]: Start difference. First operand 12965 states and 46658 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:42,354 INFO L93 Difference]: Finished difference Result 15799 states and 56125 transitions. [2022-01-18 06:41:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:41:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:42,395 INFO L225 Difference]: With dead ends: 15799 [2022-01-18 06:41:42,395 INFO L226 Difference]: Without dead ends: 15665 [2022-01-18 06:41:42,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:41:42,395 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:42,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 157 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-01-18 06:41:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15665 states. [2022-01-18 06:41:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15665 to 12889. [2022-01-18 06:41:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12889 states, 12888 states have (on average 3.6007914338919926) internal successors, (46407), 12888 states have internal predecessors, (46407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12889 states to 12889 states and 46407 transitions. [2022-01-18 06:41:42,629 INFO L78 Accepts]: Start accepts. Automaton has 12889 states and 46407 transitions. Word has length 28 [2022-01-18 06:41:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:42,629 INFO L470 AbstractCegarLoop]: Abstraction has 12889 states and 46407 transitions. [2022-01-18 06:41:42,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 12889 states and 46407 transitions. [2022-01-18 06:41:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:42,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:42,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:42,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:42,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:42,852 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash 177393772, now seen corresponding path program 120 times [2022-01-18 06:41:42,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:42,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278355827] [2022-01-18 06:41:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:42,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:43,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278355827] [2022-01-18 06:41:43,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278355827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598365199] [2022-01-18 06:41:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:41:43,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:43,051 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 06:41:43,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:41:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:41:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:43,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:43,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:43,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:43,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 06:41:43,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:43,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 80 [2022-01-18 06:41:43,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-01-18 06:41:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:44,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:44,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:44,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 85 [2022-01-18 06:41:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:44,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:44,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:41:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:44,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598365199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:44,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:44,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:41:44,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511947517] [2022-01-18 06:41:44,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:44,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:41:44,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:41:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:41:44,962 INFO L87 Difference]: Start difference. First operand 12889 states and 46407 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:48,115 INFO L93 Difference]: Finished difference Result 20867 states and 72987 transitions. [2022-01-18 06:41:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 06:41:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:48,160 INFO L225 Difference]: With dead ends: 20867 [2022-01-18 06:41:48,160 INFO L226 Difference]: Without dead ends: 20781 [2022-01-18 06:41:48,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=791, Invalid=6015, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 06:41:48,161 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2286 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:48,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 448 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 816 Invalid, 0 Unknown, 2286 Unchecked, 0.4s Time] [2022-01-18 06:41:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-01-18 06:41:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 13053. [2022-01-18 06:41:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13053 states, 13052 states have (on average 3.5927827152926755) internal successors, (46893), 13052 states have internal predecessors, (46893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13053 states to 13053 states and 46893 transitions. [2022-01-18 06:41:48,417 INFO L78 Accepts]: Start accepts. Automaton has 13053 states and 46893 transitions. Word has length 28 [2022-01-18 06:41:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 13053 states and 46893 transitions. [2022-01-18 06:41:48,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13053 states and 46893 transitions. [2022-01-18 06:41:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:48,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:48,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:48,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 06:41:48,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:48,638 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1021488582, now seen corresponding path program 121 times [2022-01-18 06:41:48,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:48,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457182132] [2022-01-18 06:41:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:48,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:48,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457182132] [2022-01-18 06:41:48,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457182132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:48,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69478992] [2022-01-18 06:41:48,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:41:48,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:48,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:48,859 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:48,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 06:41:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:41:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:49,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:49,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 06:41:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:49,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:41:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:49,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:49,423 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:41:49,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:41:49,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:49,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:41:49,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,533 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:41:49,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:41:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:49,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:41:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:49,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69478992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:49,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:49,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:41:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891661605] [2022-01-18 06:41:49,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:41:49,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:41:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:41:49,662 INFO L87 Difference]: Start difference. First operand 13053 states and 46893 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:50,128 INFO L93 Difference]: Finished difference Result 17382 states and 61295 transitions. [2022-01-18 06:41:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 06:41:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:50,168 INFO L225 Difference]: With dead ends: 17382 [2022-01-18 06:41:50,168 INFO L226 Difference]: Without dead ends: 17339 [2022-01-18 06:41:50,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-01-18 06:41:50,169 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:50,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 214 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 386 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 06:41:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-01-18 06:41:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 13148. [2022-01-18 06:41:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 13147 states have (on average 3.5892599072031643) internal successors, (47188), 13147 states have internal predecessors, (47188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 47188 transitions. [2022-01-18 06:41:50,524 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 47188 transitions. Word has length 28 [2022-01-18 06:41:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:50,524 INFO L470 AbstractCegarLoop]: Abstraction has 13148 states and 47188 transitions. [2022-01-18 06:41:50,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 47188 transitions. [2022-01-18 06:41:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:50,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:50,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:50,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 06:41:50,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:50,748 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1270364268, now seen corresponding path program 122 times [2022-01-18 06:41:50,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:50,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261919962] [2022-01-18 06:41:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:50,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:50,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261919962] [2022-01-18 06:41:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261919962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804213139] [2022-01-18 06:41:50,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:41:50,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:50,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:50,972 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:50,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 06:41:51,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:41:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:41:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:51,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:51,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:51,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 06:41:51,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:51,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 85 [2022-01-18 06:41:51,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2022-01-18 06:41:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:51,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:52,069 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:41:52,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 85 [2022-01-18 06:41:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:52,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:52,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-01-18 06:41:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804213139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:52,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 06:41:52,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316404196] [2022-01-18 06:41:52,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 06:41:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 06:41:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:41:52,747 INFO L87 Difference]: Start difference. First operand 13148 states and 47188 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:41:54,830 INFO L93 Difference]: Finished difference Result 21637 states and 75420 transitions. [2022-01-18 06:41:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:41:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:41:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:41:54,880 INFO L225 Difference]: With dead ends: 21637 [2022-01-18 06:41:54,880 INFO L226 Difference]: Without dead ends: 21492 [2022-01-18 06:41:54,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:41:54,881 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 987 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:41:54,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 426 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 911 Invalid, 0 Unknown, 987 Unchecked, 0.4s Time] [2022-01-18 06:41:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21492 states. [2022-01-18 06:41:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21492 to 13298. [2022-01-18 06:41:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13298 states, 13297 states have (on average 3.590584342332857) internal successors, (47744), 13297 states have internal predecessors, (47744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13298 states to 13298 states and 47744 transitions. [2022-01-18 06:41:55,174 INFO L78 Accepts]: Start accepts. Automaton has 13298 states and 47744 transitions. Word has length 28 [2022-01-18 06:41:55,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:41:55,174 INFO L470 AbstractCegarLoop]: Abstraction has 13298 states and 47744 transitions. [2022-01-18 06:41:55,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:41:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13298 states and 47744 transitions. [2022-01-18 06:41:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:41:55,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:41:55,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:41:55,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 06:41:55,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:55,398 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:41:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:41:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1836575384, now seen corresponding path program 123 times [2022-01-18 06:41:55,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:41:55,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85711128] [2022-01-18 06:41:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:41:55,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:41:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:41:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:55,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:41:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85711128] [2022-01-18 06:41:55,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85711128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:41:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216287586] [2022-01-18 06:41:55,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:41:55,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:41:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:41:55,663 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:41:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 06:41:55,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:41:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:41:55,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:41:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:41:56,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:41:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:56,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:56,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 48 [2022-01-18 06:41:56,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:56,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 84 [2022-01-18 06:41:56,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2022-01-18 06:41:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:56,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:41:57,025 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:41:57,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 85 [2022-01-18 06:41:57,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:57,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:41:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:41:57,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:41:57,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2022-01-18 06:41:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:41:57,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216287586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:41:57,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:41:57,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-01-18 06:41:57,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158623734] [2022-01-18 06:41:57,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:41:57,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:41:57,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:41:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:41:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:41:57,498 INFO L87 Difference]: Start difference. First operand 13298 states and 47744 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:01,843 INFO L93 Difference]: Finished difference Result 29160 states and 100540 transitions. [2022-01-18 06:42:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 06:42:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:01,914 INFO L225 Difference]: With dead ends: 29160 [2022-01-18 06:42:01,914 INFO L226 Difference]: Without dead ends: 29001 [2022-01-18 06:42:01,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 06:42:01,915 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 257 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1515 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:01,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 655 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1681 Invalid, 0 Unknown, 1515 Unchecked, 0.9s Time] [2022-01-18 06:42:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29001 states. [2022-01-18 06:42:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29001 to 13334. [2022-01-18 06:42:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13334 states, 13333 states have (on average 3.59063976599415) internal successors, (47874), 13333 states have internal predecessors, (47874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13334 states to 13334 states and 47874 transitions. [2022-01-18 06:42:02,261 INFO L78 Accepts]: Start accepts. Automaton has 13334 states and 47874 transitions. Word has length 28 [2022-01-18 06:42:02,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:02,261 INFO L470 AbstractCegarLoop]: Abstraction has 13334 states and 47874 transitions. [2022-01-18 06:42:02,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:02,261 INFO L276 IsEmpty]: Start isEmpty. Operand 13334 states and 47874 transitions. [2022-01-18 06:42:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:02,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:02,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:02,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 06:42:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-01-18 06:42:02,484 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -195901830, now seen corresponding path program 124 times [2022-01-18 06:42:02,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:02,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432979885] [2022-01-18 06:42:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:02,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:02,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432979885] [2022-01-18 06:42:02,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432979885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630701062] [2022-01-18 06:42:02,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:42:02,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:02,702 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:02,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 06:42:02,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:42:02,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:03,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:03,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:42:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:03,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 06:42:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:03,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:03,291 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:03,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:42:03,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:03,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-01-18 06:42:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,463 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:03,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:03,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:03,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:03,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630701062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:03,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:03,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:03,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727527508] [2022-01-18 06:42:03,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:03,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:03,588 INFO L87 Difference]: Start difference. First operand 13334 states and 47874 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:04,417 INFO L93 Difference]: Finished difference Result 17565 states and 61968 transitions. [2022-01-18 06:42:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 06:42:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:04,454 INFO L225 Difference]: With dead ends: 17565 [2022-01-18 06:42:04,454 INFO L226 Difference]: Without dead ends: 17496 [2022-01-18 06:42:04,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 06:42:04,455 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 278 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 671 Invalid, 0 Unknown, 518 Unchecked, 0.3s Time] [2022-01-18 06:42:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17496 states. [2022-01-18 06:42:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17496 to 13197. [2022-01-18 06:42:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13197 states, 13196 states have (on average 3.5944225522885724) internal successors, (47432), 13196 states have internal predecessors, (47432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13197 states to 13197 states and 47432 transitions. [2022-01-18 06:42:04,689 INFO L78 Accepts]: Start accepts. Automaton has 13197 states and 47432 transitions. Word has length 28 [2022-01-18 06:42:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 13197 states and 47432 transitions. [2022-01-18 06:42:04,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13197 states and 47432 transitions. [2022-01-18 06:42:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:04,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:04,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:04,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 06:42:04,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 06:42:04,912 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1874669942, now seen corresponding path program 125 times [2022-01-18 06:42:04,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:04,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260100125] [2022-01-18 06:42:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:04,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:05,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260100125] [2022-01-18 06:42:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260100125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535492638] [2022-01-18 06:42:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:42:05,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:05,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:05,097 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:05,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 06:42:05,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:42:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 06:42:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:05,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:05,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:42:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:05,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:42:05,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:05,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:05,697 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:05,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:05,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:05,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:05,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,830 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:05,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:05,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:05,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535492638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:05,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:05,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:05,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490995489] [2022-01-18 06:42:05,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:05,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:05,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:05,960 INFO L87 Difference]: Start difference. First operand 13197 states and 47432 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:06,505 INFO L93 Difference]: Finished difference Result 16308 states and 57849 transitions. [2022-01-18 06:42:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:42:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:06,540 INFO L225 Difference]: With dead ends: 16308 [2022-01-18 06:42:06,540 INFO L226 Difference]: Without dead ends: 16293 [2022-01-18 06:42:06,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:42:06,541 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 69 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:06,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 285 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 707 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-01-18 06:42:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16293 states. [2022-01-18 06:42:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16293 to 13256. [2022-01-18 06:42:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13255 states have (on average 3.593511882308563) internal successors, (47632), 13255 states have internal predecessors, (47632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 47632 transitions. [2022-01-18 06:42:06,777 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 47632 transitions. Word has length 28 [2022-01-18 06:42:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:06,777 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 47632 transitions. [2022-01-18 06:42:06,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 47632 transitions. [2022-01-18 06:42:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:06,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:06,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:06,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 06:42:06,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:06,999 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -527539186, now seen corresponding path program 126 times [2022-01-18 06:42:06,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948730710] [2022-01-18 06:42:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:06,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:07,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948730710] [2022-01-18 06:42:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948730710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504135003] [2022-01-18 06:42:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:42:07,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:07,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:07,193 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:07,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 06:42:07,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:42:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:07,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:07,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 06:42:07,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:07,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:07,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:42:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:07,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:07,825 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:07,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:07,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:07,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:07,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:07,970 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:07,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:08,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:08,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504135003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:08,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:08,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:08,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625567341] [2022-01-18 06:42:08,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:08,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:08,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:08,154 INFO L87 Difference]: Start difference. First operand 13256 states and 47632 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:08,691 INFO L93 Difference]: Finished difference Result 16326 states and 57916 transitions. [2022-01-18 06:42:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:42:08,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:08,726 INFO L225 Difference]: With dead ends: 16326 [2022-01-18 06:42:08,726 INFO L226 Difference]: Without dead ends: 16311 [2022-01-18 06:42:08,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:42:08,726 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:08,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 272 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 691 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2022-01-18 06:42:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2022-01-18 06:42:08,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 13234. [2022-01-18 06:42:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-01-18 06:42:08,954 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-01-18 06:42:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:08,954 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-01-18 06:42:08,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-01-18 06:42:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:08,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:08,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:08,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:09,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 06:42:09,177 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash 896549742, now seen corresponding path program 127 times [2022-01-18 06:42:09,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:09,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888476761] [2022-01-18 06:42:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:09,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:09,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888476761] [2022-01-18 06:42:09,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888476761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314948856] [2022-01-18 06:42:09,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:42:09,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:09,367 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:09,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 06:42:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:09,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:09,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-01-18 06:42:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:09,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:09,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-01-18 06:42:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:09,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:09,948 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:09,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:10,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:10,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:10,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:10,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:10,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:10,076 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:10,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:10,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:10,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:10,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:10,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:10,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314948856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:10,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:10,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:10,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160557018] [2022-01-18 06:42:10,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:10,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:10,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:10,186 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:10,604 INFO L93 Difference]: Finished difference Result 16304 states and 57804 transitions. [2022-01-18 06:42:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:42:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:10,644 INFO L225 Difference]: With dead ends: 16304 [2022-01-18 06:42:10,644 INFO L226 Difference]: Without dead ends: 16289 [2022-01-18 06:42:10,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:42:10,644 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:10,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 261 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 407 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-01-18 06:42:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16289 states. [2022-01-18 06:42:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16289 to 13260. [2022-01-18 06:42:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13259 states have (on average 3.5910702164567465) internal successors, (47614), 13259 states have internal predecessors, (47614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 47614 transitions. [2022-01-18 06:42:10,909 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 47614 transitions. Word has length 28 [2022-01-18 06:42:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 47614 transitions. [2022-01-18 06:42:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 47614 transitions. [2022-01-18 06:42:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:10,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:10,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:10,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 06:42:11,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 06:42:11,132 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2051286798, now seen corresponding path program 128 times [2022-01-18 06:42:11,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:11,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326065337] [2022-01-18 06:42:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:11,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:11,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326065337] [2022-01-18 06:42:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326065337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:11,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254436986] [2022-01-18 06:42:11,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:42:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:11,324 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:11,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 06:42:11,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:42:11,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:11,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:11,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:11,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:11,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:42:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:11,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:11,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:42:11,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:11,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:11,968 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:11,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:12,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:12,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:12,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:12,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:12,107 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:12,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:12,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:12,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:12,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:12,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254436986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:12,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:12,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:12,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040749472] [2022-01-18 06:42:12,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:12,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:12,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:12,228 INFO L87 Difference]: Start difference. First operand 13260 states and 47614 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:12,873 INFO L93 Difference]: Finished difference Result 16450 states and 58205 transitions. [2022-01-18 06:42:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:42:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:12,907 INFO L225 Difference]: With dead ends: 16450 [2022-01-18 06:42:12,908 INFO L226 Difference]: Without dead ends: 16435 [2022-01-18 06:42:12,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:42:12,908 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:12,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 276 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 762 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-01-18 06:42:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16435 states. [2022-01-18 06:42:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16435 to 13282. [2022-01-18 06:42:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 3.5894134477825466) internal successors, (47671), 13281 states have internal predecessors, (47671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 47671 transitions. [2022-01-18 06:42:13,126 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 47671 transitions. Word has length 28 [2022-01-18 06:42:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:13,126 INFO L470 AbstractCegarLoop]: Abstraction has 13282 states and 47671 transitions. [2022-01-18 06:42:13,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 47671 transitions. [2022-01-18 06:42:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:13,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:13,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:13,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:13,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:13,349 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1354025700, now seen corresponding path program 129 times [2022-01-18 06:42:13,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412831068] [2022-01-18 06:42:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:13,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:13,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412831068] [2022-01-18 06:42:13,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412831068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:13,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604186583] [2022-01-18 06:42:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:42:13,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:13,536 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:13,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 06:42:13,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:42:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:13,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:13,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:42:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:13,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:42:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:13,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:14,128 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:14,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:14,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:14,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:14,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:14,255 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:14,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:14,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:14,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604186583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:14,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338984612] [2022-01-18 06:42:14,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:14,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:14,371 INFO L87 Difference]: Start difference. First operand 13282 states and 47671 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:14,863 INFO L93 Difference]: Finished difference Result 16320 states and 57838 transitions. [2022-01-18 06:42:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:42:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:14,899 INFO L225 Difference]: With dead ends: 16320 [2022-01-18 06:42:14,899 INFO L226 Difference]: Without dead ends: 16313 [2022-01-18 06:42:14,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:42:14,899 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:14,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 228 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 563 Invalid, 0 Unknown, 367 Unchecked, 0.2s Time] [2022-01-18 06:42:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2022-01-18 06:42:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 13234. [2022-01-18 06:42:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13234 states, 13233 states have (on average 3.592911660243331) internal successors, (47545), 13233 states have internal predecessors, (47545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13234 states to 13234 states and 47545 transitions. [2022-01-18 06:42:15,132 INFO L78 Accepts]: Start accepts. Automaton has 13234 states and 47545 transitions. Word has length 28 [2022-01-18 06:42:15,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:15,132 INFO L470 AbstractCegarLoop]: Abstraction has 13234 states and 47545 transitions. [2022-01-18 06:42:15,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 13234 states and 47545 transitions. [2022-01-18 06:42:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:15,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:15,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:15,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 06:42:15,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:15,354 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash -571975410, now seen corresponding path program 130 times [2022-01-18 06:42:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581296493] [2022-01-18 06:42:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:15,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:15,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581296493] [2022-01-18 06:42:15,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581296493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096627212] [2022-01-18 06:42:15,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:42:15,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:15,573 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:15,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 06:42:15,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:42:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:15,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:16,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-18 06:42:16,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:16,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:42:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:16,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:16,205 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:16,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:16,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:16,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,332 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:16,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:16,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:16,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096627212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:16,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:16,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:16,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288565382] [2022-01-18 06:42:16,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:16,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:16,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:16,443 INFO L87 Difference]: Start difference. First operand 13234 states and 47545 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:16,799 INFO L93 Difference]: Finished difference Result 16234 states and 57608 transitions. [2022-01-18 06:42:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:42:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:16,835 INFO L225 Difference]: With dead ends: 16234 [2022-01-18 06:42:16,835 INFO L226 Difference]: Without dead ends: 16194 [2022-01-18 06:42:16,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:42:16,835 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:16,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-18 06:42:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16194 states. [2022-01-18 06:42:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16194 to 13255. [2022-01-18 06:42:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13254 states have (on average 3.5926512750867663) internal successors, (47617), 13254 states have internal predecessors, (47617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 47617 transitions. [2022-01-18 06:42:17,122 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 47617 transitions. Word has length 28 [2022-01-18 06:42:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 47617 transitions. [2022-01-18 06:42:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 47617 transitions. [2022-01-18 06:42:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:17,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:17,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:17,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:17,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 06:42:17,344 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash -429594712, now seen corresponding path program 131 times [2022-01-18 06:42:17,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142280590] [2022-01-18 06:42:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:17,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:17,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:17,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142280590] [2022-01-18 06:42:17,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142280590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:17,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782667793] [2022-01-18 06:42:17,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:42:17,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:17,532 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:17,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 06:42:17,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:42:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:17,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:18,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 06:42:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-01-18 06:42:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:18,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:18,153 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:18,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:18,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:18,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:18,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,292 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:18,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:18,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:18,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:18,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782667793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:18,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:18,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:18,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186550755] [2022-01-18 06:42:18,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:18,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:18,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:18,415 INFO L87 Difference]: Start difference. First operand 13255 states and 47617 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:18,827 INFO L93 Difference]: Finished difference Result 16228 states and 57590 transitions. [2022-01-18 06:42:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:42:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:18,862 INFO L225 Difference]: With dead ends: 16228 [2022-01-18 06:42:18,862 INFO L226 Difference]: Without dead ends: 16188 [2022-01-18 06:42:18,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:42:18,862 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:18,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 265 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 556 Invalid, 0 Unknown, 364 Unchecked, 0.2s Time] [2022-01-18 06:42:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2022-01-18 06:42:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 13252. [2022-01-18 06:42:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13251 states have (on average 3.5927099841521395) internal successors, (47607), 13251 states have internal predecessors, (47607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 47607 transitions. [2022-01-18 06:42:19,102 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 47607 transitions. Word has length 28 [2022-01-18 06:42:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:19,102 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 47607 transitions. [2022-01-18 06:42:19,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 47607 transitions. [2022-01-18 06:42:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:19,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:19,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:19,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:19,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:19,325 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 495899154, now seen corresponding path program 132 times [2022-01-18 06:42:19,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:19,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954017066] [2022-01-18 06:42:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:19,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:19,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954017066] [2022-01-18 06:42:19,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954017066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686026613] [2022-01-18 06:42:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:42:19,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:19,531 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 06:42:19,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:42:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:19,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-18 06:42:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:19,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:19,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:42:19,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2022-01-18 06:42:19,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-01-18 06:42:20,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:42:20,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 59 [2022-01-18 06:42:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:20,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:20,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:42:20,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 79 [2022-01-18 06:42:21,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:21,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:21,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:42:21,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 90 [2022-01-18 06:42:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686026613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:21,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:21,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-01-18 06:42:21,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121150821] [2022-01-18 06:42:21,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:21,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:42:21,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:42:21,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:42:21,635 INFO L87 Difference]: Start difference. First operand 13252 states and 47607 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:24,515 INFO L93 Difference]: Finished difference Result 22494 states and 78741 transitions. [2022-01-18 06:42:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:42:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:24,570 INFO L225 Difference]: With dead ends: 22494 [2022-01-18 06:42:24,570 INFO L226 Difference]: Without dead ends: 22457 [2022-01-18 06:42:24,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=749, Invalid=3943, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 06:42:24,571 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 248 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:24,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 318 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 742 Invalid, 0 Unknown, 1298 Unchecked, 0.4s Time] [2022-01-18 06:42:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22457 states. [2022-01-18 06:42:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22457 to 13326. [2022-01-18 06:42:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13325 states have (on average 3.588893058161351) internal successors, (47822), 13325 states have internal predecessors, (47822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 47822 transitions. [2022-01-18 06:42:24,865 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 47822 transitions. Word has length 28 [2022-01-18 06:42:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:24,865 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 47822 transitions. [2022-01-18 06:42:24,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 47822 transitions. [2022-01-18 06:42:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:24,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:24,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:24,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:25,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:25,119 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1588869650, now seen corresponding path program 133 times [2022-01-18 06:42:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969162629] [2022-01-18 06:42:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:25,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:25,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:25,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969162629] [2022-01-18 06:42:25,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969162629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:25,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645766854] [2022-01-18 06:42:25,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:42:25,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:25,312 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:25,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 06:42:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:25,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:25,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-18 06:42:25,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:25,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:25,860 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:25,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:25,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:42:25,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:25,994 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:25,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:26,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:26,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:26,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645766854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:26,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:26,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:26,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141908165] [2022-01-18 06:42:26,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:26,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:26,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:26,112 INFO L87 Difference]: Start difference. First operand 13326 states and 47822 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:26,617 INFO L93 Difference]: Finished difference Result 16438 states and 58225 transitions. [2022-01-18 06:42:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:42:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:26,655 INFO L225 Difference]: With dead ends: 16438 [2022-01-18 06:42:26,655 INFO L226 Difference]: Without dead ends: 16423 [2022-01-18 06:42:26,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:42:26,656 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:26,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 220 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 712 Invalid, 0 Unknown, 298 Unchecked, 0.3s Time] [2022-01-18 06:42:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16423 states. [2022-01-18 06:42:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16423 to 13316. [2022-01-18 06:42:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13316 states, 13315 states have (on average 3.590837401426962) internal successors, (47812), 13315 states have internal predecessors, (47812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13316 states to 13316 states and 47812 transitions. [2022-01-18 06:42:26,899 INFO L78 Accepts]: Start accepts. Automaton has 13316 states and 47812 transitions. Word has length 28 [2022-01-18 06:42:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:26,899 INFO L470 AbstractCegarLoop]: Abstraction has 13316 states and 47812 transitions. [2022-01-18 06:42:26,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13316 states and 47812 transitions. [2022-01-18 06:42:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:26,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:26,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:26,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 06:42:27,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:27,123 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1983508238, now seen corresponding path program 134 times [2022-01-18 06:42:27,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288155301] [2022-01-18 06:42:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:27,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:27,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288155301] [2022-01-18 06:42:27,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288155301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:27,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281629422] [2022-01-18 06:42:27,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:42:27,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:27,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:27,323 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:27,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 06:42:27,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:42:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:27,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:27,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:27,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 06:42:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:27,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-01-18 06:42:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:27,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:27,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:27,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:28,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:28,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-01-18 06:42:28,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:28,129 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:28,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:28,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:28,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281629422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:28,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 06:42:28,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269264681] [2022-01-18 06:42:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:42:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:42:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:42:28,245 INFO L87 Difference]: Start difference. First operand 13316 states and 47812 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:28,672 INFO L93 Difference]: Finished difference Result 16291 states and 57840 transitions. [2022-01-18 06:42:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:42:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:28,707 INFO L225 Difference]: With dead ends: 16291 [2022-01-18 06:42:28,708 INFO L226 Difference]: Without dead ends: 16276 [2022-01-18 06:42:28,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:42:28,708 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:28,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 268 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 564 Invalid, 0 Unknown, 501 Unchecked, 0.2s Time] [2022-01-18 06:42:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2022-01-18 06:42:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 13344. [2022-01-18 06:42:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 13343 states have (on average 3.5899722701041745) internal successors, (47901), 13343 states have internal predecessors, (47901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 47901 transitions. [2022-01-18 06:42:28,938 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 47901 transitions. Word has length 28 [2022-01-18 06:42:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:28,938 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 47901 transitions. [2022-01-18 06:42:28,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 47901 transitions. [2022-01-18 06:42:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:28,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:28,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:28,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 06:42:29,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:29,161 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1243584494, now seen corresponding path program 135 times [2022-01-18 06:42:29,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:29,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901434357] [2022-01-18 06:42:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:29,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901434357] [2022-01-18 06:42:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901434357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38133668] [2022-01-18 06:42:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:42:29,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:29,360 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:29,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 06:42:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:42:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:29,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:29,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:42:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:29,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:42:29,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:29,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:29,915 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:29,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:29,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:29,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:29,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:29,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:42:30,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:30,081 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:30,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:30,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:30,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:30,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:30,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38133668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:30,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:30,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:30,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656995957] [2022-01-18 06:42:30,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:30,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:30,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:30,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:30,199 INFO L87 Difference]: Start difference. First operand 13344 states and 47901 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:30,702 INFO L93 Difference]: Finished difference Result 16489 states and 58443 transitions. [2022-01-18 06:42:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 06:42:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:30,737 INFO L225 Difference]: With dead ends: 16489 [2022-01-18 06:42:30,737 INFO L226 Difference]: Without dead ends: 16467 [2022-01-18 06:42:30,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:42:30,738 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:30,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 214 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 589 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-01-18 06:42:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2022-01-18 06:42:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 13355. [2022-01-18 06:42:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13355 states, 13354 states have (on average 3.5897109480305525) internal successors, (47937), 13354 states have internal predecessors, (47937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13355 states to 13355 states and 47937 transitions. [2022-01-18 06:42:30,967 INFO L78 Accepts]: Start accepts. Automaton has 13355 states and 47937 transitions. Word has length 28 [2022-01-18 06:42:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:30,967 INFO L470 AbstractCegarLoop]: Abstraction has 13355 states and 47937 transitions. [2022-01-18 06:42:30,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 13355 states and 47937 transitions. [2022-01-18 06:42:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:30,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:30,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:31,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 06:42:31,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 06:42:31,189 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1394116370, now seen corresponding path program 136 times [2022-01-18 06:42:31,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:31,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471047047] [2022-01-18 06:42:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:31,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:31,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:31,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471047047] [2022-01-18 06:42:31,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471047047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855258249] [2022-01-18 06:42:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:42:31,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:31,389 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:31,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 06:42:31,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:42:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:31,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:31,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-01-18 06:42:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:31,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:31,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-01-18 06:42:31,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-01-18 06:42:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:31,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:31,926 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:31,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:31,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:42:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:32,170 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:32,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:32,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:32,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855258249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:32,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:32,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:32,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867996526] [2022-01-18 06:42:32,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:32,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:32,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:32,297 INFO L87 Difference]: Start difference. First operand 13355 states and 47937 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:32,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:32,860 INFO L93 Difference]: Finished difference Result 16399 states and 58176 transitions. [2022-01-18 06:42:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 06:42:32,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:32,895 INFO L225 Difference]: With dead ends: 16399 [2022-01-18 06:42:32,896 INFO L226 Difference]: Without dead ends: 16384 [2022-01-18 06:42:32,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:42:32,896 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:32,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 218 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 871 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-01-18 06:42:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16384 states. [2022-01-18 06:42:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16384 to 13379. [2022-01-18 06:42:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13379 states, 13378 states have (on average 3.5891015099416954) internal successors, (48015), 13378 states have internal predecessors, (48015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13379 states to 13379 states and 48015 transitions. [2022-01-18 06:42:33,123 INFO L78 Accepts]: Start accepts. Automaton has 13379 states and 48015 transitions. Word has length 28 [2022-01-18 06:42:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:33,124 INFO L470 AbstractCegarLoop]: Abstraction has 13379 states and 48015 transitions. [2022-01-18 06:42:33,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 13379 states and 48015 transitions. [2022-01-18 06:42:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:33,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:33,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:33,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:33,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 06:42:33,346 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1422186770, now seen corresponding path program 137 times [2022-01-18 06:42:33,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:33,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114569888] [2022-01-18 06:42:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:33,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:33,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114569888] [2022-01-18 06:42:33,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114569888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088042418] [2022-01-18 06:42:33,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:42:33,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:33,552 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:33,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 06:42:33,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:42:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:33,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:33,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:33,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-01-18 06:42:33,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:34,103 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:34,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:34,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:34,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:42:34,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:34,242 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:34,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:34,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:34,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088042418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:34,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:34,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:34,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816053296] [2022-01-18 06:42:34,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:34,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:34,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:34,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:34,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:34,365 INFO L87 Difference]: Start difference. First operand 13379 states and 48015 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:34,890 INFO L93 Difference]: Finished difference Result 16427 states and 58227 transitions. [2022-01-18 06:42:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:42:34,890 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:34,933 INFO L225 Difference]: With dead ends: 16427 [2022-01-18 06:42:34,933 INFO L226 Difference]: Without dead ends: 16405 [2022-01-18 06:42:34,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:42:34,934 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:34,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 753 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-01-18 06:42:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16405 states. [2022-01-18 06:42:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16405 to 13384. [2022-01-18 06:42:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-01-18 06:42:35,189 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-01-18 06:42:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:35,189 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-01-18 06:42:35,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-01-18 06:42:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:35,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:35,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:35,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:35,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 06:42:35,413 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 64634450, now seen corresponding path program 138 times [2022-01-18 06:42:35,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703242541] [2022-01-18 06:42:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:35,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:35,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703242541] [2022-01-18 06:42:35,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703242541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:35,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128672065] [2022-01-18 06:42:35,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:42:35,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:35,649 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:35,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 06:42:35,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 06:42:35,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:35,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:35,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:36,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:42:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-01-18 06:42:36,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-01-18 06:42:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:36,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:36,219 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:36,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 55 [2022-01-18 06:42:36,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:36,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-18 06:42:36,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,354 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:36,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 48 [2022-01-18 06:42:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:36,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128672065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:36,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:36,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:36,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372787830] [2022-01-18 06:42:36,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:36,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:36,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:36,472 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:37,050 INFO L93 Difference]: Finished difference Result 16415 states and 58199 transitions. [2022-01-18 06:42:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:42:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:37,091 INFO L225 Difference]: With dead ends: 16415 [2022-01-18 06:42:37,091 INFO L226 Difference]: Without dead ends: 16393 [2022-01-18 06:42:37,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:42:37,092 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:37,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 199 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 722 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-01-18 06:42:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2022-01-18 06:42:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 13384. [2022-01-18 06:42:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13384 states, 13383 states have (on average 3.5892550250317568) internal successors, (48035), 13383 states have internal predecessors, (48035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13384 states to 13384 states and 48035 transitions. [2022-01-18 06:42:37,329 INFO L78 Accepts]: Start accepts. Automaton has 13384 states and 48035 transitions. Word has length 28 [2022-01-18 06:42:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:37,329 INFO L470 AbstractCegarLoop]: Abstraction has 13384 states and 48035 transitions. [2022-01-18 06:42:37,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 13384 states and 48035 transitions. [2022-01-18 06:42:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:37,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:37,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:37,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:37,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 06:42:37,551 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:37,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1351336178, now seen corresponding path program 139 times [2022-01-18 06:42:37,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:37,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035582543] [2022-01-18 06:42:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:37,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:37,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:37,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035582543] [2022-01-18 06:42:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035582543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:37,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517726572] [2022-01-18 06:42:37,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:42:37,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:37,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:37,756 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:37,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 06:42:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:37,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:38,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-01-18 06:42:38,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-01-18 06:42:38,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-18 06:42:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:38,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:38,330 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:38,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:42:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:38,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:42:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:38,439 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:38,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:38,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:38,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:38,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517726572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:38,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:38,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:38,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63400258] [2022-01-18 06:42:38,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:38,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:38,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:38,552 INFO L87 Difference]: Start difference. First operand 13384 states and 48035 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:39,786 INFO L93 Difference]: Finished difference Result 16590 states and 58631 transitions. [2022-01-18 06:42:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 06:42:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:39,827 INFO L225 Difference]: With dead ends: 16590 [2022-01-18 06:42:39,827 INFO L226 Difference]: Without dead ends: 16534 [2022-01-18 06:42:39,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:42:39,828 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:39,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 510 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:42:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2022-01-18 06:42:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 13423. [2022-01-18 06:42:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13423 states, 13422 states have (on average 3.5890329310087914) internal successors, (48172), 13422 states have internal predecessors, (48172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13423 states to 13423 states and 48172 transitions. [2022-01-18 06:42:40,103 INFO L78 Accepts]: Start accepts. Automaton has 13423 states and 48172 transitions. Word has length 28 [2022-01-18 06:42:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:40,103 INFO L470 AbstractCegarLoop]: Abstraction has 13423 states and 48172 transitions. [2022-01-18 06:42:40,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 13423 states and 48172 transitions. [2022-01-18 06:42:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:40,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:40,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:40,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 06:42:40,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:40,328 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -677061838, now seen corresponding path program 140 times [2022-01-18 06:42:40,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:40,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472081304] [2022-01-18 06:42:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:40,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:40,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472081304] [2022-01-18 06:42:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472081304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422389367] [2022-01-18 06:42:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:42:40,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:40,557 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:40,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 06:42:40,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:42:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 06:42:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:40,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 06:42:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:40,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:40,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-01-18 06:42:40,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:42:40,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-01-18 06:42:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:40,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:42:41,113 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:42:41,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 58 [2022-01-18 06:42:41,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:41,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-01-18 06:42:41,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:41,239 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 06:42:41,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-01-18 06:42:41,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:41,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:42:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:42:41,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-18 06:42:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422389367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:42:41,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:42:41,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 06:42:41,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324750009] [2022-01-18 06:42:41,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:42:41,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:42:41,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:42:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:42:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:42:41,356 INFO L87 Difference]: Start difference. First operand 13423 states and 48172 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:42:41,875 INFO L93 Difference]: Finished difference Result 13748 states and 49036 transitions. [2022-01-18 06:42:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:42:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 06:42:41,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:42:41,977 INFO L225 Difference]: With dead ends: 13748 [2022-01-18 06:42:41,977 INFO L226 Difference]: Without dead ends: 13733 [2022-01-18 06:42:41,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-18 06:42:41,978 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:42:41,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 338 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 932 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2022-01-18 06:42:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13733 states. [2022-01-18 06:42:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13733 to 13449. [2022-01-18 06:42:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13449 states, 13448 states have (on average 3.5883402736466388) internal successors, (48256), 13448 states have internal predecessors, (48256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 48256 transitions. [2022-01-18 06:42:42,193 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 48256 transitions. Word has length 28 [2022-01-18 06:42:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:42:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 13449 states and 48256 transitions. [2022-01-18 06:42:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:42:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 48256 transitions. [2022-01-18 06:42:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 06:42:42,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:42:42,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:42:42,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 06:42:42,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 06:42:42,419 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:42:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:42:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1456034806, now seen corresponding path program 141 times [2022-01-18 06:42:42,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:42:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618694547] [2022-01-18 06:42:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:42:42,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:42:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:42:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:42:42,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:42:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618694547] [2022-01-18 06:42:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618694547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:42:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016140843] [2022-01-18 06:42:42,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:42:42,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:42:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:42:42,684 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 06:42:42,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 06:42:42,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:42:42,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:42:42,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-18 06:42:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:42:42,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 06:42:43,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-01-18 06:42:43,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 06:42:43,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:42:43,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-01-18 06:49:26,392 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 06:49:26,393 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 06:49:26,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 06:49:26,410 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:49:26,410 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 06:49:26,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:49:26,594 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. [2022-01-18 06:49:26,596 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 06:49:26,596 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 06:49:26,596 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 06:49:26,598 INFO L732 BasicCegarLoop]: Path program histogram: [141, 5, 2, 1, 1, 1] [2022-01-18 06:49:26,600 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 06:49:26,600 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 06:49:26,602 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 06:49:26 BasicIcfg [2022-01-18 06:49:26,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 06:49:26,602 INFO L158 Benchmark]: Toolchain (without parser) took 790545.38ms. Allocated memory was 379.6MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 338.0MB in the beginning and 845.0MB in the end (delta: -507.0MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 379.6MB. Free memory is still 339.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.05ms. Allocated memory is still 379.6MB. Free memory was 337.9MB in the beginning and 336.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L158 Benchmark]: Boogie Preprocessor took 13.46ms. Allocated memory is still 379.6MB. Free memory was 336.4MB in the beginning and 335.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L158 Benchmark]: RCFGBuilder took 204.15ms. Allocated memory is still 379.6MB. Free memory was 335.4MB in the beginning and 326.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L158 Benchmark]: TraceAbstraction took 790286.20ms. Allocated memory was 379.6MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 325.5MB in the beginning and 845.0MB in the end (delta: -519.6MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2022-01-18 06:49:26,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 379.6MB. Free memory is still 339.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.05ms. Allocated memory is still 379.6MB. Free memory was 337.9MB in the beginning and 336.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 13.46ms. Allocated memory is still 379.6MB. Free memory was 336.4MB in the beginning and 335.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 204.15ms. Allocated memory is still 379.6MB. Free memory was 335.4MB in the beginning and 326.0MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 790286.20ms. Allocated memory was 379.6MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 325.5MB in the beginning and 845.0MB in the end (delta: -519.6MB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 20ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 40 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 790.2s, OverallIterations: 151, TraceHistogramMax: 2, PathProgramHistogramMax: 141, EmptinessCheckTime: 2.4s, AutomataDifference: 166.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21005 SdHoareTripleChecker+Valid, 52.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21005 mSDsluCounter, 40114 SdHoareTripleChecker+Invalid, 44.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60372 IncrementalHoareTripleChecker+Unchecked, 67982 mSDsCounter, 4307 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108260 IncrementalHoareTripleChecker+Invalid, 172939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4307 mSolverCounterUnsat, 4476 mSDtfsCounter, 108260 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11466 GetRequests, 5793 SyntacticMatches, 623 SemanticMatches, 5050 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 80441 ImplicationChecksByTransitivity, 138.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13449occurred in iteration=150, InterpolantAutomatonStates: 4399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 27.8s AutomataMinimizationTime, 150 MinimizatonAttempts, 531030 StatesRemovedByMinimization, 150 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 153.2s InterpolantComputationTime, 7858 NumberOfCodeBlocks, 7858 NumberOfCodeBlocksAsserted, 480 NumberOfCheckSat, 11282 ConstructedInterpolants, 1162 QuantifiedInterpolants, 285645 SizeOfPredicates, 1175 NumberOfNonLiveVariables, 11431 ConjunctsInSsa, 4722 ConjunctsInUnsatCore, 434 InterpolantComputations, 8 PerfectInterpolantSequences, 205/4606 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown