/usr/bin/java -Xmx8000000000 -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/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:46:22,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:46:22,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:46:22,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:46:22,869 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 [2022-03-03 19:46:22,892 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:46:22,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:46:22,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:46:22,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:46:22,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:46:22,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:46:22,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:46:22,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:46:22,893 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:46:22,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:46:22,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:46:22,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:46:22,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:46:22,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:46:22,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:46:22,895 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:46:22,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:46:22,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:46:23,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:46:23,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:46:23,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:46:23,135 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:46:23,136 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:46:23,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2022-03-03 19:46:23,137 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2022-03-03 19:46:23,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:46:23,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:46:23,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:46:23,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:46:23,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:46:23,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,172 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:46:23,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:46:23,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:46:23,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:46:23,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:46:23,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:46:23,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:46:23,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:46:23,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:46:23,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/1) ... [2022-03-03 19:46:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:46:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:23,213 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) [2022-03-03 19:46:23,225 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 [2022-03-03 19:46:23,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:46:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:46:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:46:23,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:46:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:46:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:46:23,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:46:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:46:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:46:23,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:46:23,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:46:23,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:46:23,254 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:46:23,288 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:46:23,289 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:46:23,400 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:46:23,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:46:23,405 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:46:23,407 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:46:23 BoogieIcfgContainer [2022-03-03 19:46:23,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:46:23,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:46:23,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:46:23,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:46:23,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:46:23" (1/2) ... [2022-03-03 19:46:23,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c615c3 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:46:23, skipping insertion in model container [2022-03-03 19:46:23,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:46:23" (2/2) ... [2022-03-03 19:46:23,415 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2022-03-03 19:46:23,419 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:46:23,419 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:46:23,419 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:46:23,419 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:46:23,462 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:46:23,492 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:46:23,497 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, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:46:23,497 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:46:23,503 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-03 19:46:23,549 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:46:23,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:23,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:23,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:23,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1704584700, now seen corresponding path program 1 times [2022-03-03 19:46:23,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:23,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513385154] [2022-03-03 19:46:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:23,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:23,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513385154] [2022-03-03 19:46:23,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513385154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:23,735 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:23,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:46:23,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394887770] [2022-03-03 19:46:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:23,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:46:23,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:46:23,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:23,767 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) 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) [2022-03-03 19:46:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:23,801 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-03 19:46:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:46:23,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) 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 [2022-03-03 19:46:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:23,811 INFO L225 Difference]: With dead ends: 298 [2022-03-03 19:46:23,811 INFO L226 Difference]: Without dead ends: 283 [2022-03-03 19:46:23,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:46:23,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 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 [2022-03-03 19:46:23,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-03 19:46:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-03 19:46:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-03 19:46:23,917 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-03 19:46:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:23,918 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-03 19:46:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) 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) [2022-03-03 19:46:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-03 19:46:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:46:23,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:23,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:23,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:46:23,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:23,922 INFO L85 PathProgramCache]: Analyzing trace with hash -665793199, now seen corresponding path program 1 times [2022-03-03 19:46:23,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:23,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678078947] [2022-03-03 19:46:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:23,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:23,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:23,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678078947] [2022-03-03 19:46:23,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678078947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:23,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:23,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:46:23,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14323541] [2022-03-03 19:46:23,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:46:23,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:46:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:46:23,972 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:24,011 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2022-03-03 19:46:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:46:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:46:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:24,013 INFO L225 Difference]: With dead ends: 249 [2022-03-03 19:46:24,013 INFO L226 Difference]: Without dead ends: 249 [2022-03-03 19:46:24,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:46:24,015 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:24,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-03 19:46:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2022-03-03 19:46:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2022-03-03 19:46:24,029 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2022-03-03 19:46:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:24,030 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2022-03-03 19:46:24,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2022-03-03 19:46:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:46:24,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:24,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:24,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:46:24,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash -970035705, now seen corresponding path program 1 times [2022-03-03 19:46:24,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:24,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779788226] [2022-03-03 19:46:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:24,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:24,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779788226] [2022-03-03 19:46:24,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779788226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:46:24,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:46:24,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:46:24,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977655483] [2022-03-03 19:46:24,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:46:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:46:24,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:24,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:46:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:46:24,079 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:24,148 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2022-03-03 19:46:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:46:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:46:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:24,151 INFO L225 Difference]: With dead ends: 332 [2022-03-03 19:46:24,151 INFO L226 Difference]: Without dead ends: 332 [2022-03-03 19:46:24,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:24,152 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:24,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:46:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-03 19:46:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2022-03-03 19:46:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2022-03-03 19:46:24,168 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2022-03-03 19:46:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:24,169 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2022-03-03 19:46:24,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2022-03-03 19:46:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:24,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:24,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:24,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:46:24,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 954256018, now seen corresponding path program 1 times [2022-03-03 19:46:24,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:24,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046665325] [2022-03-03 19:46:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:24,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:24,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046665325] [2022-03-03 19:46:24,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046665325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:24,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718189906] [2022-03-03 19:46:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:24,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:24,474 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) [2022-03-03 19:46:24,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:46:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:46:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:24,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:24,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:24,821 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-03 19:46:24,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 10 [2022-03-03 19:46:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:24,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:25,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:25,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:25,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:25,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:25,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:46:25,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:25,096 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:25,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:25,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718189906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:25,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:25,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-03 19:46:25,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868375984] [2022-03-03 19:46:25,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:25,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:46:25,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:46:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:46:25,186 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-03-03 19:46:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:25,570 INFO L93 Difference]: Finished difference Result 535 states and 1542 transitions. [2022-03-03 19:46:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:46:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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 24 [2022-03-03 19:46:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:25,573 INFO L225 Difference]: With dead ends: 535 [2022-03-03 19:46:25,573 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 19:46:25,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:46:25,574 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 234 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:25,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 112 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 19:46:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2022-03-03 19:46:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2022-03-03 19:46:25,596 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2022-03-03 19:46:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:25,596 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2022-03-03 19:46:25,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 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) [2022-03-03 19:46:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2022-03-03 19:46:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:25,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:25,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:25,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:25,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:25,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash 372317296, now seen corresponding path program 2 times [2022-03-03 19:46:25,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:25,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882372738] [2022-03-03 19:46:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:25,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:25,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882372738] [2022-03-03 19:46:25,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882372738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:25,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629173142] [2022-03-03 19:46:25,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:26,001 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) [2022-03-03 19:46:26,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:26,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:26,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:46:26,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:26,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:46:26,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-03-03 19:46:26,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 61 [2022-03-03 19:46:26,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2022-03-03 19:46:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:26,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:26,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,487 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:26,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:26,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:26,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:46:26,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:26,545 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:26,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:26,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629173142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:26,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:26,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-03 19:46:26,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832841020] [2022-03-03 19:46:26,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:26,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:46:26,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:46:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:46:26,637 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:28,152 INFO L93 Difference]: Finished difference Result 1195 states and 3469 transitions. [2022-03-03 19:46:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:46:28,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:46:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:28,158 INFO L225 Difference]: With dead ends: 1195 [2022-03-03 19:46:28,158 INFO L226 Difference]: Without dead ends: 1165 [2022-03-03 19:46:28,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=1978, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:46:28,159 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 464 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:28,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 182 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:46:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-03-03 19:46:28,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 448. [2022-03-03 19:46:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.9731543624161074) internal successors, (1329), 447 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1329 transitions. [2022-03-03 19:46:28,173 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1329 transitions. Word has length 24 [2022-03-03 19:46:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:28,174 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1329 transitions. [2022-03-03 19:46:28,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1329 transitions. [2022-03-03 19:46:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:28,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:28,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:28,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:28,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:28,392 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:28,393 INFO L85 PathProgramCache]: Analyzing trace with hash -669864304, now seen corresponding path program 3 times [2022-03-03 19:46:28,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:28,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111444920] [2022-03-03 19:46:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:28,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:28,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111444920] [2022-03-03 19:46:28,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111444920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:28,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407199524] [2022-03-03 19:46:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:28,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:28,517 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) [2022-03-03 19:46:28,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:46:28,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:46:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:46:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:28,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 [2022-03-03 19:46:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:28,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:28,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:28,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:28,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:28,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:28,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:46:28,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:28,825 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:28,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407199524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:28,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:28,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 19:46:28,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825395161] [2022-03-03 19:46:28,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:28,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:46:28,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:46:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:28,934 INFO L87 Difference]: Start difference. First operand 448 states and 1329 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:29,263 INFO L93 Difference]: Finished difference Result 682 states and 1977 transitions. [2022-03-03 19:46:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:46:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:46:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:29,266 INFO L225 Difference]: With dead ends: 682 [2022-03-03 19:46:29,266 INFO L226 Difference]: Without dead ends: 667 [2022-03-03 19:46:29,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:46:29,267 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:29,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 119 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-03 19:46:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 464. [2022-03-03 19:46:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.9568034557235423) internal successors, (1369), 463 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1369 transitions. [2022-03-03 19:46:29,277 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1369 transitions. Word has length 24 [2022-03-03 19:46:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:29,278 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1369 transitions. [2022-03-03 19:46:29,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1369 transitions. [2022-03-03 19:46:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:29,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:29,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:29,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:29,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:29,495 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1129139024, now seen corresponding path program 4 times [2022-03-03 19:46:29,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:29,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272687439] [2022-03-03 19:46:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:29,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:29,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272687439] [2022-03-03 19:46:29,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272687439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:29,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131594955] [2022-03-03 19:46:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:29,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:29,736 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) [2022-03-03 19:46:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:46:29,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:29,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:46:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:29,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:29,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:46:29,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:29,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 23 [2022-03-03 19:46:29,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:29,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:46:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:30,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:30,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:30,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:30,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:30,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:30,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:46:30,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:30,196 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:30,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:30,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131594955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:30,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:30,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-03 19:46:30,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489249152] [2022-03-03 19:46:30,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:30,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:46:30,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:46:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:46:30,292 INFO L87 Difference]: Start difference. First operand 464 states and 1369 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:30,569 INFO L93 Difference]: Finished difference Result 763 states and 2257 transitions. [2022-03-03 19:46:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:46:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:46:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:30,572 INFO L225 Difference]: With dead ends: 763 [2022-03-03 19:46:30,572 INFO L226 Difference]: Without dead ends: 748 [2022-03-03 19:46:30,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:46:30,573 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:30,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 122 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-03 19:46:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-03 19:46:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 479. [2022-03-03 19:46:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.98326359832636) internal successors, (1426), 478 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1426 transitions. [2022-03-03 19:46:30,587 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1426 transitions. Word has length 24 [2022-03-03 19:46:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:30,587 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1426 transitions. [2022-03-03 19:46:30,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1426 transitions. [2022-03-03 19:46:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:30,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:30,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:30,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:30,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:30,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1804153484, now seen corresponding path program 5 times [2022-03-03 19:46:30,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:30,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607638061] [2022-03-03 19:46:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:30,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:30,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607638061] [2022-03-03 19:46:30,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607638061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:30,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161662203] [2022-03-03 19:46:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:30,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:30,998 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) [2022-03-03 19:46:30,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:46:31,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:46:31,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:46:31,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:31,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-03-03 19:46:31,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-03-03 19:46:31,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:31,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:31,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:31,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:31,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:31,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:46:31,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:31,601 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:31,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:31,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161662203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:31,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:31,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 24 [2022-03-03 19:46:31,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458862664] [2022-03-03 19:46:31,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:31,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:46:31,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:31,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:46:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:46:31,691 INFO L87 Difference]: Start difference. First operand 479 states and 1426 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:35,903 INFO L93 Difference]: Finished difference Result 1711 states and 4956 transitions. [2022-03-03 19:46:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:46:35,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:46:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:35,918 INFO L225 Difference]: With dead ends: 1711 [2022-03-03 19:46:35,919 INFO L226 Difference]: Without dead ends: 1681 [2022-03-03 19:46:35,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2524, Invalid=11518, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:46:35,922 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 374 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 423 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1512 Invalid, 0 Unknown, 273 Unchecked, 0.9s Time] [2022-03-03 19:46:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-03-03 19:46:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 516. [2022-03-03 19:46:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.0349514563106794) internal successors, (1563), 515 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1563 transitions. [2022-03-03 19:46:35,939 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1563 transitions. Word has length 24 [2022-03-03 19:46:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1563 transitions. [2022-03-03 19:46:35,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1563 transitions. [2022-03-03 19:46:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:46:35,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:35,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:35,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:36,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:36,159 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash 795589012, now seen corresponding path program 6 times [2022-03-03 19:46:36,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:36,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676284855] [2022-03-03 19:46:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:36,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676284855] [2022-03-03 19:46:36,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676284855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:36,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949521670] [2022-03-03 19:46:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:36,327 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) [2022-03-03 19:46:36,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:46:36,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:46:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:46:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:36,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2022-03-03 19:46:36,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 59 [2022-03-03 19:46:36,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:46:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:36,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-03-03 19:46:36,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:46:36,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:36,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-03-03 19:46:36,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-03 19:46:36,797 INFO L353 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-03 19:46:36,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select 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 12 [2022-03-03 19:46:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949521670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:36,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:36,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-03 19:46:36,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093526772] [2022-03-03 19:46:36,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:36,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:46:36,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:46:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:46:36,882 INFO L87 Difference]: Start difference. First operand 516 states and 1563 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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) [2022-03-03 19:46:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:38,051 INFO L93 Difference]: Finished difference Result 1105 states and 3275 transitions. [2022-03-03 19:46:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:46:38,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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 24 [2022-03-03 19:46:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:38,056 INFO L225 Difference]: With dead ends: 1105 [2022-03-03 19:46:38,056 INFO L226 Difference]: Without dead ends: 1090 [2022-03-03 19:46:38,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:46:38,057 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 267 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:38,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 173 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:46:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-03 19:46:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 498. [2022-03-03 19:46:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.006036217303823) internal successors, (1494), 497 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1494 transitions. [2022-03-03 19:46:38,071 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1494 transitions. Word has length 24 [2022-03-03 19:46:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:38,071 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1494 transitions. [2022-03-03 19:46:38,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 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) [2022-03-03 19:46:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1494 transitions. [2022-03-03 19:46:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:38,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:38,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:38,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:38,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:38,290 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2028428791, now seen corresponding path program 7 times [2022-03-03 19:46:38,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:38,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073866484] [2022-03-03 19:46:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:38,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:38,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073866484] [2022-03-03 19:46:38,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073866484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:38,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846468704] [2022-03-03 19:46:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:38,330 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) [2022-03-03 19:46:38,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:46:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:38,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:38,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846468704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:38,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:38,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:46:38,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457029277] [2022-03-03 19:46:38,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:38,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:46:38,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:46:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:46:38,540 INFO L87 Difference]: Start difference. First operand 498 states and 1494 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-03-03 19:46:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:39,330 INFO L93 Difference]: Finished difference Result 2271 states and 6608 transitions. [2022-03-03 19:46:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:46:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 27 [2022-03-03 19:46:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:39,339 INFO L225 Difference]: With dead ends: 2271 [2022-03-03 19:46:39,339 INFO L226 Difference]: Without dead ends: 2271 [2022-03-03 19:46:39,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:46:39,340 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 422 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:39,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 196 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:46:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-03-03 19:46:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 643. [2022-03-03 19:46:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.188473520249221) internal successors, (2047), 642 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2047 transitions. [2022-03-03 19:46:39,360 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2047 transitions. Word has length 27 [2022-03-03 19:46:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:39,361 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 2047 transitions. [2022-03-03 19:46:39,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-03-03 19:46:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2047 transitions. [2022-03-03 19:46:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:39,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:39,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:39,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:39,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:39,570 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1539908103, now seen corresponding path program 8 times [2022-03-03 19:46:39,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:39,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214845060] [2022-03-03 19:46:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:39,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:39,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214845060] [2022-03-03 19:46:39,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214845060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:39,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86862616] [2022-03-03 19:46:39,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:39,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:39,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:39,624 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) [2022-03-03 19:46:39,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:46:39,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:39,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:39,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:39,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:39,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86862616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:39,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:39,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:46:39,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060087296] [2022-03-03 19:46:39,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:39,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:46:39,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:46:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:46:39,908 INFO L87 Difference]: Start difference. First operand 643 states and 2047 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-03 19:46:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:41,745 INFO L93 Difference]: Finished difference Result 3591 states and 10373 transitions. [2022-03-03 19:46:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:46:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 27 [2022-03-03 19:46:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:41,758 INFO L225 Difference]: With dead ends: 3591 [2022-03-03 19:46:41,758 INFO L226 Difference]: Without dead ends: 3591 [2022-03-03 19:46:41,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:46:41,761 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:41,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 338 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:46:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2022-03-03 19:46:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 647. [2022-03-03 19:46:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.1996904024767803) internal successors, (2067), 646 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2067 transitions. [2022-03-03 19:46:41,791 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2067 transitions. Word has length 27 [2022-03-03 19:46:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:41,791 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2067 transitions. [2022-03-03 19:46:41,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-03 19:46:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2067 transitions. [2022-03-03 19:46:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:41,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:41,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:41,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:42,007 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,SelfDestructingSolverStorable10 [2022-03-03 19:46:42,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1733808771, now seen corresponding path program 9 times [2022-03-03 19:46:42,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:42,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831684023] [2022-03-03 19:46:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:42,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:42,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831684023] [2022-03-03 19:46:42,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831684023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:42,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095796817] [2022-03-03 19:46:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:42,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:42,053 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) [2022-03-03 19:46:42,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:46:42,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:46:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:42,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:42,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095796817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:42,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:42,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:46:42,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118115214] [2022-03-03 19:46:42,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:46:42,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:46:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:46:42,284 INFO L87 Difference]: Start difference. First operand 647 states and 2067 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-03 19:46:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:43,168 INFO L93 Difference]: Finished difference Result 2922 states and 8417 transitions. [2022-03-03 19:46:43,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:46:43,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 27 [2022-03-03 19:46:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:43,179 INFO L225 Difference]: With dead ends: 2922 [2022-03-03 19:46:43,179 INFO L226 Difference]: Without dead ends: 2922 [2022-03-03 19:46:43,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:46:43,181 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 471 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:43,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 248 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:46:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-03-03 19:46:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 637. [2022-03-03 19:46:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.1871069182389937) internal successors, (2027), 636 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2027 transitions. [2022-03-03 19:46:43,204 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2027 transitions. Word has length 27 [2022-03-03 19:46:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2027 transitions. [2022-03-03 19:46:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-03-03 19:46:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2027 transitions. [2022-03-03 19:46:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:43,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:43,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:43,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:43,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:43,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:43,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:43,421 INFO L85 PathProgramCache]: Analyzing trace with hash 373023270, now seen corresponding path program 1 times [2022-03-03 19:46:43,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:43,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656481168] [2022-03-03 19:46:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:43,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:43,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:43,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656481168] [2022-03-03 19:46:43,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656481168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:43,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630847200] [2022-03-03 19:46:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:43,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:43,450 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) [2022-03-03 19:46:43,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:46:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:43,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:46:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:43,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:43,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630847200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:43,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:43,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:46:43,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184601452] [2022-03-03 19:46:43,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:43,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:46:43,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:46:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:46:43,599 INFO L87 Difference]: Start difference. First operand 637 states and 2027 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:43,718 INFO L93 Difference]: Finished difference Result 1395 states and 4216 transitions. [2022-03-03 19:46:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:46:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:43,722 INFO L225 Difference]: With dead ends: 1395 [2022-03-03 19:46:43,723 INFO L226 Difference]: Without dead ends: 1377 [2022-03-03 19:46:43,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:43,723 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 305 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:43,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 57 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-03-03 19:46:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 917. [2022-03-03 19:46:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.2587336244541483) internal successors, (2985), 916 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2985 transitions. [2022-03-03 19:46:43,740 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2985 transitions. Word has length 27 [2022-03-03 19:46:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:43,741 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 2985 transitions. [2022-03-03 19:46:43,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2985 transitions. [2022-03-03 19:46:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:43,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:43,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:43,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:43,959 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,SelfDestructingSolverStorable12 [2022-03-03 19:46:43,959 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1292974513, now seen corresponding path program 10 times [2022-03-03 19:46:43,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:43,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232003227] [2022-03-03 19:46:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:43,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:43,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232003227] [2022-03-03 19:46:43,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232003227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:43,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111252121] [2022-03-03 19:46:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:43,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:43,995 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) [2022-03-03 19:46:43,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:46:44,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:44,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:44,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:44,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111252121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:44,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:44,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:46:44,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200401223] [2022-03-03 19:46:44,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:44,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:46:44,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:46:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:46:44,200 INFO L87 Difference]: Start difference. First operand 917 states and 2985 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:44,515 INFO L93 Difference]: Finished difference Result 2362 states and 7302 transitions. [2022-03-03 19:46:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:46:44,515 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:44,520 INFO L225 Difference]: With dead ends: 2362 [2022-03-03 19:46:44,521 INFO L226 Difference]: Without dead ends: 2295 [2022-03-03 19:46:44,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:46:44,521 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 296 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:44,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 199 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-03-03 19:46:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1429. [2022-03-03 19:46:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.330532212885154) internal successors, (4756), 1428 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4756 transitions. [2022-03-03 19:46:44,551 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4756 transitions. Word has length 27 [2022-03-03 19:46:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:44,551 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4756 transitions. [2022-03-03 19:46:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4756 transitions. [2022-03-03 19:46:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:44,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:44,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:44,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:44,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:46:44,765 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash -502740502, now seen corresponding path program 2 times [2022-03-03 19:46:44,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:44,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891225708] [2022-03-03 19:46:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:44,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:44,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891225708] [2022-03-03 19:46:44,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891225708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:44,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096018565] [2022-03-03 19:46:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:44,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:44,796 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) [2022-03-03 19:46:44,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:46:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:44,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:46:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:44,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:44,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096018565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:44,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:44,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:46:44,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424970742] [2022-03-03 19:46:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:44,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:46:44,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:46:44,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:46:44,949 INFO L87 Difference]: Start difference. First operand 1429 states and 4756 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:45,142 INFO L93 Difference]: Finished difference Result 2511 states and 7693 transitions. [2022-03-03 19:46:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:46:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:45,148 INFO L225 Difference]: With dead ends: 2511 [2022-03-03 19:46:45,148 INFO L226 Difference]: Without dead ends: 2511 [2022-03-03 19:46:45,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:46:45,149 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 270 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:45,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 90 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-03-03 19:46:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1499. [2022-03-03 19:46:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.2963951935914553) internal successors, (4938), 1498 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4938 transitions. [2022-03-03 19:46:45,180 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4938 transitions. Word has length 27 [2022-03-03 19:46:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:45,180 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 4938 transitions. [2022-03-03 19:46:45,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4938 transitions. [2022-03-03 19:46:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:45,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:45,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:45,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:46:45,405 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash -340431285, now seen corresponding path program 11 times [2022-03-03 19:46:45,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:45,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470164874] [2022-03-03 19:46:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:45,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470164874] [2022-03-03 19:46:45,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470164874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15066309] [2022-03-03 19:46:45,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:45,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:45,448 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) [2022-03-03 19:46:45,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:46:45,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:46:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:45,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:45,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15066309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:45,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:45,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:46:45,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315079296] [2022-03-03 19:46:45,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:45,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:46:45,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:46:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:46:45,614 INFO L87 Difference]: Start difference. First operand 1499 states and 4938 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:46,186 INFO L93 Difference]: Finished difference Result 4914 states and 14852 transitions. [2022-03-03 19:46:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:46:46,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-03 19:46:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:46,197 INFO L225 Difference]: With dead ends: 4914 [2022-03-03 19:46:46,198 INFO L226 Difference]: Without dead ends: 4914 [2022-03-03 19:46:46,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:46:46,199 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 293 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:46,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 172 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:46:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-03-03 19:46:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 1527. [2022-03-03 19:46:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.290956749672346) internal successors, (5022), 1526 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5022 transitions. [2022-03-03 19:46:46,274 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5022 transitions. Word has length 27 [2022-03-03 19:46:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:46,274 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5022 transitions. [2022-03-03 19:46:46,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5022 transitions. [2022-03-03 19:46:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:46,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:46,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:46,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:46,491 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,SelfDestructingSolverStorable15 [2022-03-03 19:46:46,491 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -428155657, now seen corresponding path program 12 times [2022-03-03 19:46:46,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:46,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295431450] [2022-03-03 19:46:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:46,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:46,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295431450] [2022-03-03 19:46:46,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295431450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:46,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586133632] [2022-03-03 19:46:46,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:46,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:46,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:46,529 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) [2022-03-03 19:46:46,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:46:46,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:46:46,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:46,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:46,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:46,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586133632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:46,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:46,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:46:46,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336655547] [2022-03-03 19:46:46,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:46,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:46:46,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:46:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:46:46,700 INFO L87 Difference]: Start difference. First operand 1527 states and 5022 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:47,389 INFO L93 Difference]: Finished difference Result 4943 states and 15025 transitions. [2022-03-03 19:46:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:46:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-03 19:46:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:47,399 INFO L225 Difference]: With dead ends: 4943 [2022-03-03 19:46:47,400 INFO L226 Difference]: Without dead ends: 4943 [2022-03-03 19:46:47,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:46:47,402 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 327 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:47,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 180 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:46:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4943 states. [2022-03-03 19:46:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4943 to 1683. [2022-03-03 19:46:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.256837098692033) internal successors, (5478), 1682 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5478 transitions. [2022-03-03 19:46:47,459 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5478 transitions. Word has length 27 [2022-03-03 19:46:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:47,459 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5478 transitions. [2022-03-03 19:46:47,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5478 transitions. [2022-03-03 19:46:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:47,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:47,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:47,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:47,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:47,679 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 193811757, now seen corresponding path program 13 times [2022-03-03 19:46:47,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:47,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345749227] [2022-03-03 19:46:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:47,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:47,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:47,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345749227] [2022-03-03 19:46:47,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345749227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:47,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701510003] [2022-03-03 19:46:47,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:47,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:47,720 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) [2022-03-03 19:46:47,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:46:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:47,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701510003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:47,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:47,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:46:47,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886110101] [2022-03-03 19:46:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:47,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:46:47,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:46:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:46:47,910 INFO L87 Difference]: Start difference. First operand 1683 states and 5478 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:48,218 INFO L93 Difference]: Finished difference Result 3283 states and 10240 transitions. [2022-03-03 19:46:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:46:48,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:48,225 INFO L225 Difference]: With dead ends: 3283 [2022-03-03 19:46:48,225 INFO L226 Difference]: Without dead ends: 3283 [2022-03-03 19:46:48,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:46:48,226 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:48,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 208 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2022-03-03 19:46:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2080. [2022-03-03 19:46:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 3.3044733044733046) internal successors, (6870), 2079 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 6870 transitions. [2022-03-03 19:46:48,273 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 6870 transitions. Word has length 27 [2022-03-03 19:46:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 6870 transitions. [2022-03-03 19:46:48,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 6870 transitions. [2022-03-03 19:46:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:48,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:48,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:48,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:46:48,483 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1978086597, now seen corresponding path program 14 times [2022-03-03 19:46:48,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:48,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256051757] [2022-03-03 19:46:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:48,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:48,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256051757] [2022-03-03 19:46:48,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256051757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:48,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356085599] [2022-03-03 19:46:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:48,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:48,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:48,526 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) [2022-03-03 19:46:48,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:46:48,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:48,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356085599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:48,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:48,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:46:48,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686381478] [2022-03-03 19:46:48,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:48,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:46:48,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:46:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:46:48,697 INFO L87 Difference]: Start difference. First operand 2080 states and 6870 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:49,262 INFO L93 Difference]: Finished difference Result 5570 states and 17389 transitions. [2022-03-03 19:46:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:46:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-03-03 19:46:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:49,272 INFO L225 Difference]: With dead ends: 5570 [2022-03-03 19:46:49,272 INFO L226 Difference]: Without dead ends: 5566 [2022-03-03 19:46:49,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:46:49,273 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:49,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 154 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:46:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-03-03 19:46:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 2092. [2022-03-03 19:46:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.29507412721186) internal successors, (6890), 2091 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 6890 transitions. [2022-03-03 19:46:49,337 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 6890 transitions. Word has length 27 [2022-03-03 19:46:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:49,337 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 6890 transitions. [2022-03-03 19:46:49,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-03-03 19:46:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 6890 transitions. [2022-03-03 19:46:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:49,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:49,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:49,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 19:46:49,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:49,558 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash 721611839, now seen corresponding path program 15 times [2022-03-03 19:46:49,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:49,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656654301] [2022-03-03 19:46:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:49,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:49,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656654301] [2022-03-03 19:46:49,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656654301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:49,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151736251] [2022-03-03 19:46:49,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:49,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:49,605 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) [2022-03-03 19:46:49,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:46:49,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:46:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:49,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:49,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151736251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:49,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:49,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:46:49,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909583366] [2022-03-03 19:46:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:49,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:46:49,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:46:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:49,865 INFO L87 Difference]: Start difference. First operand 2092 states and 6890 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:50,865 INFO L93 Difference]: Finished difference Result 6718 states and 20043 transitions. [2022-03-03 19:46:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:46:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:50,877 INFO L225 Difference]: With dead ends: 6718 [2022-03-03 19:46:50,878 INFO L226 Difference]: Without dead ends: 6718 [2022-03-03 19:46:50,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:46:50,879 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 463 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:50,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 284 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:46:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6718 states. [2022-03-03 19:46:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6718 to 2263. [2022-03-03 19:46:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3320070733863836) internal successors, (7537), 2262 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7537 transitions. [2022-03-03 19:46:50,951 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7537 transitions. Word has length 27 [2022-03-03 19:46:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:50,952 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7537 transitions. [2022-03-03 19:46:50,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7537 transitions. [2022-03-03 19:46:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:50,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:50,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:50,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:51,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:51,173 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1790705987, now seen corresponding path program 16 times [2022-03-03 19:46:51,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:51,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109789441] [2022-03-03 19:46:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:51,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109789441] [2022-03-03 19:46:51,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109789441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:51,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84849406] [2022-03-03 19:46:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:51,209 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) [2022-03-03 19:46:51,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:46:51,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:51,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84849406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:51,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:51,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:46:51,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570491985] [2022-03-03 19:46:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:51,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:46:51,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:46:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:51,486 INFO L87 Difference]: Start difference. First operand 2263 states and 7537 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:52,785 INFO L93 Difference]: Finished difference Result 6558 states and 19960 transitions. [2022-03-03 19:46:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:46:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:52,798 INFO L225 Difference]: With dead ends: 6558 [2022-03-03 19:46:52,798 INFO L226 Difference]: Without dead ends: 6554 [2022-03-03 19:46:52,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:46:52,800 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 545 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:52,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 258 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:46:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6554 states. [2022-03-03 19:46:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6554 to 2263. [2022-03-03 19:46:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.3311229000884173) internal successors, (7535), 2262 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7535 transitions. [2022-03-03 19:46:52,883 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7535 transitions. Word has length 27 [2022-03-03 19:46:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7535 transitions. [2022-03-03 19:46:52,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7535 transitions. [2022-03-03 19:46:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:52,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:52,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:52,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:53,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:53,108 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1441844744, now seen corresponding path program 3 times [2022-03-03 19:46:53,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:53,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236754677] [2022-03-03 19:46:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:53,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:53,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236754677] [2022-03-03 19:46:53,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236754677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:53,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83731186] [2022-03-03 19:46:53,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:53,135 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) [2022-03-03 19:46:53,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:46:53,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:46:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:53,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:46:53,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:53,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:53,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83731186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:53,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:53,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 19:46:53,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927083686] [2022-03-03 19:46:53,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:53,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:46:53,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:46:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:46:53,272 INFO L87 Difference]: Start difference. First operand 2263 states and 7535 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) 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) [2022-03-03 19:46:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:53,388 INFO L93 Difference]: Finished difference Result 2910 states and 9299 transitions. [2022-03-03 19:46:53,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:46:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) 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 27 [2022-03-03 19:46:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:53,393 INFO L225 Difference]: With dead ends: 2910 [2022-03-03 19:46:53,393 INFO L226 Difference]: Without dead ends: 2910 [2022-03-03 19:46:53,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:46:53,394 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:53,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 92 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2022-03-03 19:46:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2121. [2022-03-03 19:46:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3141509433962266) internal successors, (7026), 2120 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7026 transitions. [2022-03-03 19:46:53,431 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7026 transitions. Word has length 27 [2022-03-03 19:46:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7026 transitions. [2022-03-03 19:46:53,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) 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) [2022-03-03 19:46:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7026 transitions. [2022-03-03 19:46:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:53,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:53,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:53,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:53,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:53,651 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:53,651 INFO L85 PathProgramCache]: Analyzing trace with hash -746228089, now seen corresponding path program 17 times [2022-03-03 19:46:53,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:53,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027158246] [2022-03-03 19:46:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:53,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:53,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:53,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027158246] [2022-03-03 19:46:53,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027158246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:53,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973001128] [2022-03-03 19:46:53,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:53,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:53,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:53,692 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) [2022-03-03 19:46:53,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:46:53,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:46:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:53,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:53,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973001128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:53,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:53,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:46:53,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104708115] [2022-03-03 19:46:53,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:53,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:46:53,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:46:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:46:53,839 INFO L87 Difference]: Start difference. First operand 2121 states and 7026 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:54,237 INFO L93 Difference]: Finished difference Result 4738 states and 14874 transitions. [2022-03-03 19:46:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:46:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:54,245 INFO L225 Difference]: With dead ends: 4738 [2022-03-03 19:46:54,245 INFO L226 Difference]: Without dead ends: 4738 [2022-03-03 19:46:54,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:46:54,246 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 201 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:54,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 142 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-03-03 19:46:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2263. [2022-03-03 19:46:54,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2904509283819627) internal successors, (7443), 2262 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7443 transitions. [2022-03-03 19:46:54,298 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7443 transitions. Word has length 27 [2022-03-03 19:46:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7443 transitions. [2022-03-03 19:46:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7443 transitions. [2022-03-03 19:46:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:54,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:54,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:54,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:54,502 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,SelfDestructingSolverStorable22 [2022-03-03 19:46:54,503 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -93700181, now seen corresponding path program 18 times [2022-03-03 19:46:54,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:54,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790903528] [2022-03-03 19:46:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:54,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:54,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790903528] [2022-03-03 19:46:54,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790903528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:54,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954166963] [2022-03-03 19:46:54,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:54,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:54,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:54,536 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) [2022-03-03 19:46:54,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:46:54,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:46:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:54,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:54,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:54,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954166963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:54,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:54,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:46:54,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994648858] [2022-03-03 19:46:54,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:54,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:46:54,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:46:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:46:54,675 INFO L87 Difference]: Start difference. First operand 2263 states and 7443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:55,058 INFO L93 Difference]: Finished difference Result 5029 states and 15712 transitions. [2022-03-03 19:46:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:46:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:55,067 INFO L225 Difference]: With dead ends: 5029 [2022-03-03 19:46:55,068 INFO L226 Difference]: Without dead ends: 5029 [2022-03-03 19:46:55,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:46:55,068 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 227 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:55,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 128 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-03-03 19:46:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2429. [2022-03-03 19:46:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 3.2701812191103787) internal successors, (7940), 2428 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7940 transitions. [2022-03-03 19:46:55,133 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7940 transitions. Word has length 27 [2022-03-03 19:46:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:55,133 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 7940 transitions. [2022-03-03 19:46:55,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7940 transitions. [2022-03-03 19:46:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:55,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:55,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:55,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-03 19:46:55,345 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,SelfDestructingSolverStorable23 [2022-03-03 19:46:55,345 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash -421030457, now seen corresponding path program 19 times [2022-03-03 19:46:55,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:55,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902766640] [2022-03-03 19:46:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:55,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:55,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902766640] [2022-03-03 19:46:55,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902766640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:55,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100680406] [2022-03-03 19:46:55,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:55,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:55,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:55,389 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) [2022-03-03 19:46:55,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:46:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:55,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:55,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:55,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100680406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:55,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:55,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 19:46:55,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675560110] [2022-03-03 19:46:55,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:55,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:46:55,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:46:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:46:55,553 INFO L87 Difference]: Start difference. First operand 2429 states and 7940 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-03-03 19:46:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:55,795 INFO L93 Difference]: Finished difference Result 3230 states and 10321 transitions. [2022-03-03 19:46:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:46:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 27 [2022-03-03 19:46:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:55,801 INFO L225 Difference]: With dead ends: 3230 [2022-03-03 19:46:55,801 INFO L226 Difference]: Without dead ends: 3220 [2022-03-03 19:46:55,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:46:55,802 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 219 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:55,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 184 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-03-03 19:46:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2644. [2022-03-03 19:46:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.3019296254256525) internal successors, (8727), 2643 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8727 transitions. [2022-03-03 19:46:55,841 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8727 transitions. Word has length 27 [2022-03-03 19:46:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:55,842 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8727 transitions. [2022-03-03 19:46:55,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-03-03 19:46:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8727 transitions. [2022-03-03 19:46:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:55,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:55,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:55,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:56,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,055 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1643631121, now seen corresponding path program 20 times [2022-03-03 19:46:56,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:56,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973441941] [2022-03-03 19:46:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:56,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:56,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973441941] [2022-03-03 19:46:56,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973441941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:56,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253824541] [2022-03-03 19:46:56,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:56,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:56,086 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) [2022-03-03 19:46:56,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:46:56,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:56,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:56,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:56,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253824541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:56,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:56,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:46:56,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111705927] [2022-03-03 19:46:56,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:56,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:46:56,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:46:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:46:56,234 INFO L87 Difference]: Start difference. First operand 2644 states and 8727 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:56,557 INFO L93 Difference]: Finished difference Result 5352 states and 17038 transitions. [2022-03-03 19:46:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:46:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:56,567 INFO L225 Difference]: With dead ends: 5352 [2022-03-03 19:46:56,567 INFO L226 Difference]: Without dead ends: 5348 [2022-03-03 19:46:56,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:46:56,568 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 248 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:56,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 103 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-03 19:46:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2644. [2022-03-03 19:46:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.2996594778660615) internal successors, (8721), 2643 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8721 transitions. [2022-03-03 19:46:56,624 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8721 transitions. Word has length 27 [2022-03-03 19:46:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:56,624 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8721 transitions. [2022-03-03 19:46:56,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8721 transitions. [2022-03-03 19:46:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:56,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:56,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:56,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:46:56,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,843 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash -151626389, now seen corresponding path program 21 times [2022-03-03 19:46:56,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:56,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757941523] [2022-03-03 19:46:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:56,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:56,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757941523] [2022-03-03 19:46:56,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757941523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:56,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895322554] [2022-03-03 19:46:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:56,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:56,879 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) [2022-03-03 19:46:56,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:46:56,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:46:56,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:56,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895322554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:57,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:57,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:46:57,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902102661] [2022-03-03 19:46:57,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:57,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:46:57,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:46:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:46:57,018 INFO L87 Difference]: Start difference. First operand 2644 states and 8721 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:57,359 INFO L93 Difference]: Finished difference Result 5332 states and 16988 transitions. [2022-03-03 19:46:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:46:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:46:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:57,370 INFO L225 Difference]: With dead ends: 5332 [2022-03-03 19:46:57,370 INFO L226 Difference]: Without dead ends: 5316 [2022-03-03 19:46:57,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:46:57,371 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:57,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 114 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-03 19:46:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2652. [2022-03-03 19:46:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.29422859298378) internal successors, (8733), 2651 states have internal predecessors, (8733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8733 transitions. [2022-03-03 19:46:57,439 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8733 transitions. Word has length 27 [2022-03-03 19:46:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:57,439 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8733 transitions. [2022-03-03 19:46:57,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8733 transitions. [2022-03-03 19:46:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:57,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:57,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:57,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:57,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:46:57,659 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2105412629, now seen corresponding path program 22 times [2022-03-03 19:46:57,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:57,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296236431] [2022-03-03 19:46:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:57,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296236431] [2022-03-03 19:46:57,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296236431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:57,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904085718] [2022-03-03 19:46:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:57,700 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) [2022-03-03 19:46:57,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:46:57,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:57,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904085718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:57,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:57,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:46:57,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746952851] [2022-03-03 19:46:57,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:57,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:46:57,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:46:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:57,926 INFO L87 Difference]: Start difference. First operand 2652 states and 8733 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-03-03 19:46:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:58,842 INFO L93 Difference]: Finished difference Result 11005 states and 34872 transitions. [2022-03-03 19:46:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:46:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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 27 [2022-03-03 19:46:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:58,882 INFO L225 Difference]: With dead ends: 11005 [2022-03-03 19:46:58,883 INFO L226 Difference]: Without dead ends: 11005 [2022-03-03 19:46:58,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:46:58,883 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 443 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:58,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 217 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:46:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2022-03-03 19:46:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 3423. [2022-03-03 19:46:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.4585037989479837) internal successors, (11835), 3422 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 11835 transitions. [2022-03-03 19:46:58,984 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 11835 transitions. Word has length 27 [2022-03-03 19:46:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:58,984 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 11835 transitions. [2022-03-03 19:46:58,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-03-03 19:46:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 11835 transitions. [2022-03-03 19:46:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:46:58,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:58,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:59,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:59,190 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,SelfDestructingSolverStorable27 [2022-03-03 19:46:59,190 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1995653999, now seen corresponding path program 23 times [2022-03-03 19:46:59,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:59,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349227453] [2022-03-03 19:46:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:59,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:59,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:59,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349227453] [2022-03-03 19:46:59,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349227453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:59,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722583383] [2022-03-03 19:46:59,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:59,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:59,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:59,237 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) [2022-03-03 19:46:59,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:46:59,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:46:59,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:59,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:59,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:59,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722583383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:59,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:59,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:46:59,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830496656] [2022-03-03 19:46:59,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:59,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:46:59,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:46:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:46:59,445 INFO L87 Difference]: Start difference. First operand 3423 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-03-03 19:47:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:00,208 INFO L93 Difference]: Finished difference Result 9376 states and 29674 transitions. [2022-03-03 19:47:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:47:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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 27 [2022-03-03 19:47:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:00,225 INFO L225 Difference]: With dead ends: 9376 [2022-03-03 19:47:00,225 INFO L226 Difference]: Without dead ends: 9376 [2022-03-03 19:47:00,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:47:00,226 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 549 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:00,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 192 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-03-03 19:47:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 3420. [2022-03-03 19:47:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.4574436969874234) internal successors, (11821), 3419 states have internal predecessors, (11821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 11821 transitions. [2022-03-03 19:47:00,344 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 11821 transitions. Word has length 27 [2022-03-03 19:47:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:00,345 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 11821 transitions. [2022-03-03 19:47:00,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-03-03 19:47:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 11821 transitions. [2022-03-03 19:47:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:00,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:00,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:00,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 19:47:00,551 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,SelfDestructingSolverStorable28 [2022-03-03 19:47:00,552 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:00,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1623744233, now seen corresponding path program 24 times [2022-03-03 19:47:00,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:00,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277133047] [2022-03-03 19:47:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:00,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:00,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277133047] [2022-03-03 19:47:00,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277133047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:00,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430048977] [2022-03-03 19:47:00,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:00,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:00,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:00,588 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) [2022-03-03 19:47:00,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:47:00,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:47:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:00,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:00,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430048977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:00,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:00,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:47:00,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615594325] [2022-03-03 19:47:00,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:00,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:47:00,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:47:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:47:00,762 INFO L87 Difference]: Start difference. First operand 3420 states and 11821 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:01,513 INFO L93 Difference]: Finished difference Result 10210 states and 32078 transitions. [2022-03-03 19:47:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:47:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:01,534 INFO L225 Difference]: With dead ends: 10210 [2022-03-03 19:47:01,534 INFO L226 Difference]: Without dead ends: 10210 [2022-03-03 19:47:01,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:47:01,535 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 397 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:01,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 188 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:47:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2022-03-03 19:47:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 3434. [2022-03-03 19:47:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.459364986891931) internal successors, (11876), 3433 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11876 transitions. [2022-03-03 19:47:01,651 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11876 transitions. Word has length 27 [2022-03-03 19:47:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:01,651 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11876 transitions. [2022-03-03 19:47:01,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11876 transitions. [2022-03-03 19:47:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:01,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:01,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:01,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,863 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1434525935, now seen corresponding path program 25 times [2022-03-03 19:47:01,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:01,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071674776] [2022-03-03 19:47:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:01,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:01,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071674776] [2022-03-03 19:47:01,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071674776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:01,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623654171] [2022-03-03 19:47:01,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:01,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:01,900 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) [2022-03-03 19:47:01,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:47:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:02,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:02,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623654171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:02,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:02,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 19:47:02,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571906861] [2022-03-03 19:47:02,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:02,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:47:02,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:47:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:47:02,106 INFO L87 Difference]: Start difference. First operand 3434 states and 11876 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:02,775 INFO L93 Difference]: Finished difference Result 9874 states and 31277 transitions. [2022-03-03 19:47:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:47:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:02,794 INFO L225 Difference]: With dead ends: 9874 [2022-03-03 19:47:02,794 INFO L226 Difference]: Without dead ends: 9870 [2022-03-03 19:47:02,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:47:02,795 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 185 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:47:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-03-03 19:47:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 3434. [2022-03-03 19:47:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-03 19:47:02,912 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-03 19:47:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-03 19:47:02,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-03 19:47:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:02,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:02,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:02,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:03,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:03,136 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1470920145, now seen corresponding path program 26 times [2022-03-03 19:47:03,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:03,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357197469] [2022-03-03 19:47:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:03,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:03,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357197469] [2022-03-03 19:47:03,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357197469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:03,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975474899] [2022-03-03 19:47:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:03,172 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) [2022-03-03 19:47:03,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:47:03,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:03,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:03,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:03,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975474899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:03,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:03,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:47:03,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906668720] [2022-03-03 19:47:03,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:47:03,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:47:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:47:03,368 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:04,056 INFO L93 Difference]: Finished difference Result 8065 states and 25290 transitions. [2022-03-03 19:47:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:47:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:04,074 INFO L225 Difference]: With dead ends: 8065 [2022-03-03 19:47:04,074 INFO L226 Difference]: Without dead ends: 8065 [2022-03-03 19:47:04,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:47:04,075 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 424 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:04,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 229 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-03 19:47:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 3440. [2022-03-03 19:47:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.4594358825239895) internal successors, (11897), 3439 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 11897 transitions. [2022-03-03 19:47:04,175 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 11897 transitions. Word has length 27 [2022-03-03 19:47:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:04,175 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 11897 transitions. [2022-03-03 19:47:04,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 11897 transitions. [2022-03-03 19:47:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:04,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:04,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:04,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:04,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:04,399 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 311729325, now seen corresponding path program 27 times [2022-03-03 19:47:04,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:04,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922237227] [2022-03-03 19:47:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:04,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:04,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922237227] [2022-03-03 19:47:04,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922237227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:04,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992040762] [2022-03-03 19:47:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:04,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:04,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:04,433 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) [2022-03-03 19:47:04,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:47:04,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:47:04,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:04,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:04,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992040762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:04,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:04,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:47:04,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143076349] [2022-03-03 19:47:04,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:04,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:47:04,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:47:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:47:04,624 INFO L87 Difference]: Start difference. First operand 3440 states and 11897 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:05,448 INFO L93 Difference]: Finished difference Result 7992 states and 25480 transitions. [2022-03-03 19:47:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:47:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:05,465 INFO L225 Difference]: With dead ends: 7992 [2022-03-03 19:47:05,465 INFO L226 Difference]: Without dead ends: 7988 [2022-03-03 19:47:05,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:47:05,466 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 511 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:05,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 187 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:47:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-03-03 19:47:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 3434. [2022-03-03 19:47:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-03 19:47:05,563 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-03 19:47:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-03 19:47:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-03 19:47:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:05,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:05,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:05,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:05,773 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,SelfDestructingSolverStorable32 [2022-03-03 19:47:05,773 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1354997805, now seen corresponding path program 28 times [2022-03-03 19:47:05,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:05,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078084802] [2022-03-03 19:47:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:05,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:05,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078084802] [2022-03-03 19:47:05,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078084802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:05,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762823060] [2022-03-03 19:47:05,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:05,811 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) [2022-03-03 19:47:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:47:05,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:05,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:05,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:05,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762823060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:05,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:05,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:47:05,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724937978] [2022-03-03 19:47:05,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:05,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:47:05,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:05,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:47:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:47:05,969 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:06,674 INFO L93 Difference]: Finished difference Result 8817 states and 28422 transitions. [2022-03-03 19:47:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:47:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:06,692 INFO L225 Difference]: With dead ends: 8817 [2022-03-03 19:47:06,693 INFO L226 Difference]: Without dead ends: 8817 [2022-03-03 19:47:06,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:47:06,693 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 334 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:06,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 177 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-03-03 19:47:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 3737. [2022-03-03 19:47:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 3.4494111349036403) internal successors, (12887), 3736 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 12887 transitions. [2022-03-03 19:47:06,796 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 12887 transitions. Word has length 27 [2022-03-03 19:47:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:06,796 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 12887 transitions. [2022-03-03 19:47:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 12887 transitions. [2022-03-03 19:47:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:06,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:06,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:06,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:07,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:07,020 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1165779507, now seen corresponding path program 29 times [2022-03-03 19:47:07,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:07,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553137758] [2022-03-03 19:47:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:07,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:07,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553137758] [2022-03-03 19:47:07,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553137758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:07,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232833795] [2022-03-03 19:47:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:07,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:07,080 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) [2022-03-03 19:47:07,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:47:07,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:47:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:07,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:07,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232833795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:07,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:07,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:47:07,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635959462] [2022-03-03 19:47:07,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:47:07,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:47:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:47:07,237 INFO L87 Difference]: Start difference. First operand 3737 states and 12887 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:07,828 INFO L93 Difference]: Finished difference Result 8396 states and 27364 transitions. [2022-03-03 19:47:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:47:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:07,845 INFO L225 Difference]: With dead ends: 8396 [2022-03-03 19:47:07,845 INFO L226 Difference]: Without dead ends: 8388 [2022-03-03 19:47:07,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:47:07,845 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 278 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:07,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 173 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-03-03 19:47:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 3725. [2022-03-03 19:47:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.44656283566058) internal successors, (12835), 3724 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 12835 transitions. [2022-03-03 19:47:07,941 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 12835 transitions. Word has length 27 [2022-03-03 19:47:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:07,941 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 12835 transitions. [2022-03-03 19:47:07,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 12835 transitions. [2022-03-03 19:47:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:07,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:07,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:07,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:47:08,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:08,148 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:08,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1809161767, now seen corresponding path program 30 times [2022-03-03 19:47:08,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:08,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665999789] [2022-03-03 19:47:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:08,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:08,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:08,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665999789] [2022-03-03 19:47:08,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665999789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:08,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657230143] [2022-03-03 19:47:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:08,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:08,185 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) [2022-03-03 19:47:08,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:47:08,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:47:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:08,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:08,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657230143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:08,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:08,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:47:08,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137848366] [2022-03-03 19:47:08,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:08,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:47:08,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:47:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:47:08,341 INFO L87 Difference]: Start difference. First operand 3725 states and 12835 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:08,952 INFO L93 Difference]: Finished difference Result 9052 states and 28913 transitions. [2022-03-03 19:47:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:47:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:08,970 INFO L225 Difference]: With dead ends: 9052 [2022-03-03 19:47:08,971 INFO L226 Difference]: Without dead ends: 9036 [2022-03-03 19:47:08,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:47:08,971 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 304 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:08,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 188 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-03-03 19:47:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 3753. [2022-03-03 19:47:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.446961620469083) internal successors, (12933), 3752 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 12933 transitions. [2022-03-03 19:47:09,085 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 12933 transitions. Word has length 27 [2022-03-03 19:47:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:09,085 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 12933 transitions. [2022-03-03 19:47:09,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 12933 transitions. [2022-03-03 19:47:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:09,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:09,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:09,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:47:09,291 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,SelfDestructingSolverStorable35 [2022-03-03 19:47:09,292 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:09,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2121517739, now seen corresponding path program 31 times [2022-03-03 19:47:09,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:09,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291741436] [2022-03-03 19:47:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:09,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:09,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:09,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291741436] [2022-03-03 19:47:09,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291741436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:09,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478599582] [2022-03-03 19:47:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:09,329 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) [2022-03-03 19:47:09,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:47:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:09,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:09,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:09,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478599582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:09,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:09,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:47:09,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93600987] [2022-03-03 19:47:09,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:09,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:47:09,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:47:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:47:09,522 INFO L87 Difference]: Start difference. First operand 3753 states and 12933 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:10,186 INFO L93 Difference]: Finished difference Result 7240 states and 23141 transitions. [2022-03-03 19:47:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:47:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:10,200 INFO L225 Difference]: With dead ends: 7240 [2022-03-03 19:47:10,201 INFO L226 Difference]: Without dead ends: 7240 [2022-03-03 19:47:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:47:10,201 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 424 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 275 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2022-03-03 19:47:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 3938. [2022-03-03 19:47:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 3.4384048768097535) internal successors, (13537), 3937 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13537 transitions. [2022-03-03 19:47:10,308 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13537 transitions. Word has length 27 [2022-03-03 19:47:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:10,308 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 13537 transitions. [2022-03-03 19:47:10,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13537 transitions. [2022-03-03 19:47:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:10,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:10,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:10,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:47:10,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:47:10,520 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash -390800087, now seen corresponding path program 32 times [2022-03-03 19:47:10,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:10,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545959891] [2022-03-03 19:47:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:10,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:10,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545959891] [2022-03-03 19:47:10,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545959891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:10,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447682889] [2022-03-03 19:47:10,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:10,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:10,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:10,559 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) [2022-03-03 19:47:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:47:10,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:10,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:10,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447682889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:10,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:10,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:47:10,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50456986] [2022-03-03 19:47:10,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:10,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:47:10,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:47:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:47:10,761 INFO L87 Difference]: Start difference. First operand 3938 states and 13537 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:11,603 INFO L93 Difference]: Finished difference Result 7155 states and 23290 transitions. [2022-03-03 19:47:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:47:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:11,618 INFO L225 Difference]: With dead ends: 7155 [2022-03-03 19:47:11,618 INFO L226 Difference]: Without dead ends: 7151 [2022-03-03 19:47:11,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:47:11,619 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 414 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:11,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 195 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-03-03 19:47:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3936. [2022-03-03 19:47:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 3.4373570520965693) internal successors, (13526), 3935 states have internal predecessors, (13526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 13526 transitions. [2022-03-03 19:47:11,723 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 13526 transitions. Word has length 27 [2022-03-03 19:47:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 13526 transitions. [2022-03-03 19:47:11,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 13526 transitions. [2022-03-03 19:47:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:47:11,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:11,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:11,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:47:11,930 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,SelfDestructingSolverStorable37 [2022-03-03 19:47:11,930 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1235771539, now seen corresponding path program 33 times [2022-03-03 19:47:11,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:11,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106057466] [2022-03-03 19:47:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:11,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:11,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106057466] [2022-03-03 19:47:11,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106057466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:11,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830075713] [2022-03-03 19:47:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:11,977 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) [2022-03-03 19:47:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:47:11,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:47:11,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:12,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:12,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:12,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830075713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:12,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:12,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:47:12,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061622558] [2022-03-03 19:47:12,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:12,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:47:12,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:47:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:47:12,155 INFO L87 Difference]: Start difference. First operand 3936 states and 13526 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:12,778 INFO L93 Difference]: Finished difference Result 6859 states and 22528 transitions. [2022-03-03 19:47:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:47:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:47:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:12,792 INFO L225 Difference]: With dead ends: 6859 [2022-03-03 19:47:12,792 INFO L226 Difference]: Without dead ends: 6843 [2022-03-03 19:47:12,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:47:12,793 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 286 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:12,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 170 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-03-03 19:47:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 3932. [2022-03-03 19:47:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 3.435766980412109) internal successors, (13506), 3931 states have internal predecessors, (13506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 13506 transitions. [2022-03-03 19:47:12,906 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 13506 transitions. Word has length 27 [2022-03-03 19:47:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:12,906 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 13506 transitions. [2022-03-03 19:47:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 13506 transitions. [2022-03-03 19:47:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:12,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:12,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:12,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:47:13,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:47:13,115 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1788265295, now seen corresponding path program 4 times [2022-03-03 19:47:13,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:13,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175314578] [2022-03-03 19:47:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:13,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:13,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175314578] [2022-03-03 19:47:13,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175314578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:13,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967675497] [2022-03-03 19:47:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:13,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:13,430 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) [2022-03-03 19:47:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:47:13,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:47:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:13,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:13,794 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 35 [2022-03-03 19:47:13,808 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:47:13,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-03-03 19:47:13,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:13,811 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 16 [2022-03-03 19:47:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:13,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:14,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:14,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:47:14,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:14,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:47:14,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:14,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:14,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:47:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:15,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:15,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:15,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:47:15,841 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:47:15,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:47:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:15,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:15,868 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 65 treesize of output 81 [2022-03-03 19:47:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:16,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967675497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:16,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:16,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:47:16,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766703495] [2022-03-03 19:47:16,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:16,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:47:16,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:16,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:47:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:47:16,225 INFO L87 Difference]: Start difference. First operand 3932 states and 13506 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:47:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:19,651 INFO L93 Difference]: Finished difference Result 8297 states and 25821 transitions. [2022-03-03 19:47:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:47:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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 30 [2022-03-03 19:47:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:19,667 INFO L225 Difference]: With dead ends: 8297 [2022-03-03 19:47:19,667 INFO L226 Difference]: Without dead ends: 8267 [2022-03-03 19:47:19,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1225, Invalid=5581, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:47:19,668 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 788 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:19,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 377 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:47:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2022-03-03 19:47:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 4021. [2022-03-03 19:47:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 3.435820895522388) internal successors, (13812), 4020 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 13812 transitions. [2022-03-03 19:47:19,757 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 13812 transitions. Word has length 30 [2022-03-03 19:47:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 13812 transitions. [2022-03-03 19:47:19,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:47:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 13812 transitions. [2022-03-03 19:47:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:19,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:19,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:19,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-03 19:47:19,964 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,SelfDestructingSolverStorable39 [2022-03-03 19:47:19,964 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 320892227, now seen corresponding path program 5 times [2022-03-03 19:47:19,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:19,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723720599] [2022-03-03 19:47:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:20,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:20,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723720599] [2022-03-03 19:47:20,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723720599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:20,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998092963] [2022-03-03 19:47:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:20,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:20,249 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) [2022-03-03 19:47:20,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:47:20,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:47:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:47:20,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:20,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:20,626 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 45 treesize of output 37 [2022-03-03 19:47:20,642 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:47:20,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 32 [2022-03-03 19:47:20,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:47:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:20,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:21,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:21,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:21,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:47:21,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:21,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:47:21,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:21,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:21,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:47:22,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:22,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:22,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:47:22,518 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:47:22,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:47:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:22,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:22,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:22,541 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 65 treesize of output 81 [2022-03-03 19:47:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:22,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998092963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:22,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:22,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-03 19:47:22,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47015810] [2022-03-03 19:47:22,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:22,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:47:22,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:47:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:47:22,855 INFO L87 Difference]: Start difference. First operand 4021 states and 13812 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:47:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:27,916 INFO L93 Difference]: Finished difference Result 8479 states and 26125 transitions. [2022-03-03 19:47:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:47:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-03 19:47:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:27,931 INFO L225 Difference]: With dead ends: 8479 [2022-03-03 19:47:27,932 INFO L226 Difference]: Without dead ends: 8434 [2022-03-03 19:47:27,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3618 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1622, Invalid=9298, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:47:27,932 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 753 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:27,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 524 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2235 Invalid, 0 Unknown, 34 Unchecked, 1.2s Time] [2022-03-03 19:47:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2022-03-03 19:47:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 4035. [2022-03-03 19:47:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 3.4338125929598413) internal successors, (13852), 4034 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 13852 transitions. [2022-03-03 19:47:28,025 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 13852 transitions. Word has length 30 [2022-03-03 19:47:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:28,025 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 13852 transitions. [2022-03-03 19:47:28,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:47:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 13852 transitions. [2022-03-03 19:47:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:28,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:28,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:28,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:47:28,232 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,SelfDestructingSolverStorable40 [2022-03-03 19:47:28,232 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1230267193, now seen corresponding path program 6 times [2022-03-03 19:47:28,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:28,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869188755] [2022-03-03 19:47:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:28,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:28,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869188755] [2022-03-03 19:47:28,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869188755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:28,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076069948] [2022-03-03 19:47:28,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:28,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:28,509 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) [2022-03-03 19:47:28,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:47:28,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:47:28,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:47:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:28,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:28,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-03 19:47:28,928 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:47:28,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-03 19:47:28,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:28,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:28,936 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:47:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:29,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:29,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:29,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:29,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:29,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 73 [2022-03-03 19:47:29,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:29,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:47:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:29,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:29,524 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 97 treesize of output 103 [2022-03-03 19:47:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:31,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 35 [2022-03-03 19:47:31,236 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-03 19:47:31,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-03-03 19:47:31,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:31,242 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 17 treesize of output 11 [2022-03-03 19:47:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:31,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076069948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:31,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:31,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-03 19:47:31,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020954577] [2022-03-03 19:47:31,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:47:31,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:47:31,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:47:31,373 INFO L87 Difference]: Start difference. First operand 4035 states and 13852 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:43,352 INFO L93 Difference]: Finished difference Result 8482 states and 27612 transitions. [2022-03-03 19:47:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-03 19:47:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:43,371 INFO L225 Difference]: With dead ends: 8482 [2022-03-03 19:47:43,371 INFO L226 Difference]: Without dead ends: 8431 [2022-03-03 19:47:43,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12021 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3638, Invalid=28582, Unknown=0, NotChecked=0, Total=32220 [2022-03-03 19:47:43,373 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 886 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 3654 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 5262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1345 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 917 Invalid, 5262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3654 Invalid, 0 Unknown, 1345 Unchecked, 2.0s Time] [2022-03-03 19:47:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2022-03-03 19:47:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 4168. [2022-03-03 19:47:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4167 states have (on average 3.4360451163906887) internal successors, (14318), 4167 states have internal predecessors, (14318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 14318 transitions. [2022-03-03 19:47:43,490 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 14318 transitions. Word has length 30 [2022-03-03 19:47:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:43,490 INFO L470 AbstractCegarLoop]: Abstraction has 4168 states and 14318 transitions. [2022-03-03 19:47:43,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 14318 transitions. [2022-03-03 19:47:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:43,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:43,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:43,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:47:43,697 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,SelfDestructingSolverStorable41 [2022-03-03 19:47:43,697 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1586750758, now seen corresponding path program 34 times [2022-03-03 19:47:43,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:43,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882613192] [2022-03-03 19:47:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:43,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:44,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:44,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882613192] [2022-03-03 19:47:44,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882613192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:44,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832180240] [2022-03-03 19:47:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:44,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:44,099 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) [2022-03-03 19:47:44,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:47:44,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:44,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:47:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:44,510 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-03-03 19:47:44,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 188 [2022-03-03 19:47:44,532 INFO L353 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-03-03 19:47:44,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 133 treesize of output 79 [2022-03-03 19:47:44,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:47:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:44,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:44,831 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:47:44,831 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 49 treesize of output 74 [2022-03-03 19:47:44,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:44,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:47:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:44,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:44,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:47:45,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:45,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:45,186 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 50 treesize of output 38 [2022-03-03 19:47:45,206 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:47:45,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-03 19:47:45,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:45,209 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 17 treesize of output 11 [2022-03-03 19:47:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:45,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832180240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:45,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:45,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-03 19:47:45,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583427352] [2022-03-03 19:47:45,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:45,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:45,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:45,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:45,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:45,289 INFO L87 Difference]: Start difference. First operand 4168 states and 14318 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:49,995 INFO L93 Difference]: Finished difference Result 7550 states and 24891 transitions. [2022-03-03 19:47:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 19:47:49,995 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:50,011 INFO L225 Difference]: With dead ends: 7550 [2022-03-03 19:47:50,011 INFO L226 Difference]: Without dead ends: 7503 [2022-03-03 19:47:50,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1324, Invalid=8182, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:47:50,012 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:50,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 422 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:47:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7503 states. [2022-03-03 19:47:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7503 to 4247. [2022-03-03 19:47:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 3.425341497880358) internal successors, (14544), 4246 states have internal predecessors, (14544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 14544 transitions. [2022-03-03 19:47:50,102 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 14544 transitions. Word has length 30 [2022-03-03 19:47:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:50,103 INFO L470 AbstractCegarLoop]: Abstraction has 4247 states and 14544 transitions. [2022-03-03 19:47:50,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 14544 transitions. [2022-03-03 19:47:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:50,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:50,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:50,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:47:50,310 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,SelfDestructingSolverStorable42 [2022-03-03 19:47:50,310 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1397852555, now seen corresponding path program 7 times [2022-03-03 19:47:50,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:50,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798979043] [2022-03-03 19:47:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:50,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:50,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:50,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798979043] [2022-03-03 19:47:50,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798979043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:50,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265181009] [2022-03-03 19:47:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:50,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:50,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:50,600 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) [2022-03-03 19:47:50,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:47:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:47:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:50,947 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 35 [2022-03-03 19:47:50,961 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:47:50,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-03-03 19:47:50,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,964 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 20 treesize of output 16 [2022-03-03 19:47:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:51,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:51,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:47:51,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:51,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:47:51,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:51,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:47:53,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:53,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:53,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:53,216 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 72 [2022-03-03 19:47:53,258 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:47:53,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:47:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:53,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:53,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:53,281 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 65 treesize of output 81 [2022-03-03 19:47:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:53,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265181009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:53,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:53,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:47:53,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468759755] [2022-03-03 19:47:53,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:53,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:47:53,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:47:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:47:53,682 INFO L87 Difference]: Start difference. First operand 4247 states and 14544 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:47:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:57,829 INFO L93 Difference]: Finished difference Result 8973 states and 27677 transitions. [2022-03-03 19:47:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:47:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-03 19:47:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:57,848 INFO L225 Difference]: With dead ends: 8973 [2022-03-03 19:47:57,848 INFO L226 Difference]: Without dead ends: 8943 [2022-03-03 19:47:57,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1712, Invalid=7408, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:47:57,849 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 961 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:57,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 428 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2039 Invalid, 0 Unknown, 37 Unchecked, 1.1s Time] [2022-03-03 19:47:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8943 states. [2022-03-03 19:47:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8943 to 4273. [2022-03-03 19:47:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 3.4262640449438204) internal successors, (14637), 4272 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 14637 transitions. [2022-03-03 19:47:57,961 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 14637 transitions. Word has length 30 [2022-03-03 19:47:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 14637 transitions. [2022-03-03 19:47:57,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:47:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 14637 transitions. [2022-03-03 19:47:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:57,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:57,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:57,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-03 19:47:58,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:58,169 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:58,169 INFO L85 PathProgramCache]: Analyzing trace with hash 583866602, now seen corresponding path program 35 times [2022-03-03 19:47:58,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:58,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21538064] [2022-03-03 19:47:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:58,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:58,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:58,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21538064] [2022-03-03 19:47:58,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21538064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:58,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878023222] [2022-03-03 19:47:58,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:58,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:58,618 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) [2022-03-03 19:47:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:47:58,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:47:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:47:58,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:58,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:58,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 [2022-03-03 19:47:58,990 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-03 19:47:58,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 33 [2022-03-03 19:47:58,993 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 16 [2022-03-03 19:47:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:59,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:59,276 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:47:59,276 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 49 treesize of output 74 [2022-03-03 19:47:59,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:59,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:47:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:59,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:59,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:59,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:48:01,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:01,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:01,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 38 [2022-03-03 19:48:01,576 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:48:01,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-03 19:48:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:01,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:48:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:01,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878023222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:01,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:01,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-03 19:48:01,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080987503] [2022-03-03 19:48:01,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:01,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:48:01,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:48:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:48:01,688 INFO L87 Difference]: Start difference. First operand 4273 states and 14637 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:08,699 INFO L93 Difference]: Finished difference Result 9455 states and 30775 transitions. [2022-03-03 19:48:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 19:48:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:08,717 INFO L225 Difference]: With dead ends: 9455 [2022-03-03 19:48:08,717 INFO L226 Difference]: Without dead ends: 9408 [2022-03-03 19:48:08,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2512, Invalid=12740, Unknown=0, NotChecked=0, Total=15252 [2022-03-03 19:48:08,718 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 741 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 3557 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:08,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 721 Invalid, 4039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3557 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:48:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-03-03 19:48:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 4295. [2022-03-03 19:48:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.426408942710759) internal successors, (14713), 4294 states have internal predecessors, (14713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 14713 transitions. [2022-03-03 19:48:08,809 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 14713 transitions. Word has length 30 [2022-03-03 19:48:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:08,809 INFO L470 AbstractCegarLoop]: Abstraction has 4295 states and 14713 transitions. [2022-03-03 19:48:08,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 14713 transitions. [2022-03-03 19:48:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:08,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:08,816 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, 1, 1] [2022-03-03 19:48:08,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:09,030 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1072387290, now seen corresponding path program 36 times [2022-03-03 19:48:09,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:09,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677937540] [2022-03-03 19:48:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:09,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:09,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677937540] [2022-03-03 19:48:09,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677937540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:09,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944980102] [2022-03-03 19:48:09,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:48:09,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:09,393 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) [2022-03-03 19:48:09,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:48:09,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:48:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:48:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:09,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:09,766 INFO L353 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-03-03 19:48:09,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2022-03-03 19:48:09,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:09,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 224 treesize of output 200 [2022-03-03 19:48:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:09,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:09,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 145 [2022-03-03 19:48:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:10,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:10,599 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:48:10,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 74 [2022-03-03 19:48:10,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:10,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:48:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:10,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:10,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:48:12,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:12,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:12,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 38 [2022-03-03 19:48:12,439 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:48:12,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-03 19:48:12,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:12,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:48:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:12,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944980102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:12,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:12,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-03 19:48:12,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147250914] [2022-03-03 19:48:12,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:12,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:48:12,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:48:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:48:12,522 INFO L87 Difference]: Start difference. First operand 4295 states and 14713 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:35,877 INFO L93 Difference]: Finished difference Result 13475 states and 43173 transitions. [2022-03-03 19:48:35,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-03-03 19:48:35,877 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:35,906 INFO L225 Difference]: With dead ends: 13475 [2022-03-03 19:48:35,907 INFO L226 Difference]: Without dead ends: 13421 [2022-03-03 19:48:35,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47099 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=9775, Invalid=98137, Unknown=0, NotChecked=0, Total=107912 [2022-03-03 19:48:35,911 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1181 mSDsluCounter, 2559 mSDsCounter, 0 mSdLazyCounter, 7440 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 8058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 7440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:35,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1589 Invalid, 8058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 7440 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-03 19:48:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2022-03-03 19:48:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 4466. [2022-03-03 19:48:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 4465 states have (on average 3.4150055991041435) internal successors, (15248), 4465 states have internal predecessors, (15248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 15248 transitions. [2022-03-03 19:48:36,066 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 15248 transitions. Word has length 30 [2022-03-03 19:48:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:36,066 INFO L470 AbstractCegarLoop]: Abstraction has 4466 states and 15248 transitions. [2022-03-03 19:48:36,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 15248 transitions. [2022-03-03 19:48:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:36,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:36,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:36,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 19:48:36,273 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,SelfDestructingSolverStorable45 [2022-03-03 19:48:36,274 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:36,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:36,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1552290073, now seen corresponding path program 8 times [2022-03-03 19:48:36,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:36,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824050479] [2022-03-03 19:48:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:36,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:36,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:36,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824050479] [2022-03-03 19:48:36,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824050479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:36,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666816546] [2022-03-03 19:48:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:48:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:36,546 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) [2022-03-03 19:48:36,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:48:36,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:36,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:48:36,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:36,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:36,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:36,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 42 [2022-03-03 19:48:36,922 INFO L353 Elim1Store]: treesize reduction 66, result has 25.8 percent of original size [2022-03-03 19:48:36,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 40 [2022-03-03 19:48:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:36,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 21 [2022-03-03 19:48:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:36,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:37,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:37,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:37,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:48:37,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:37,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:48:37,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:37,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:37,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:48:40,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:40,212 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 72 [2022-03-03 19:48:40,249 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:48:40,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:48:40,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:40,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:48:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:40,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666816546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:40,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:40,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-03 19:48:40,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799762181] [2022-03-03 19:48:40,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:40,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:40,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:40,577 INFO L87 Difference]: Start difference. First operand 4466 states and 15248 transitions. Second operand has 32 states, 32 states have (on average 2.15625) 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) [2022-03-03 19:48:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:44,846 INFO L93 Difference]: Finished difference Result 9266 states and 28594 transitions. [2022-03-03 19:48:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:48:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) 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 30 [2022-03-03 19:48:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:44,862 INFO L225 Difference]: With dead ends: 9266 [2022-03-03 19:48:44,863 INFO L226 Difference]: Without dead ends: 9244 [2022-03-03 19:48:44,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3385 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1713, Invalid=7793, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:48:44,863 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 809 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:44,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 515 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 2464 Invalid, 0 Unknown, 134 Unchecked, 1.2s Time] [2022-03-03 19:48:44,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2022-03-03 19:48:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 4458. [2022-03-03 19:48:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 3.4157505048238725) internal successors, (15224), 4457 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 15224 transitions. [2022-03-03 19:48:44,966 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 15224 transitions. Word has length 30 [2022-03-03 19:48:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:44,967 INFO L470 AbstractCegarLoop]: Abstraction has 4458 states and 15224 transitions. [2022-03-03 19:48:44,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) 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) [2022-03-03 19:48:44,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 15224 transitions. [2022-03-03 19:48:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:44,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:44,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:44,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 19:48:45,190 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 912501523, now seen corresponding path program 9 times [2022-03-03 19:48:45,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:45,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794640280] [2022-03-03 19:48:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:45,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:45,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794640280] [2022-03-03 19:48:45,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794640280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:45,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932200266] [2022-03-03 19:48:45,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:48:45,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:45,478 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) [2022-03-03 19:48:45,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:48:45,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:48:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:45,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:48:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:45,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,867 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 45 treesize of output 37 [2022-03-03 19:48:45,879 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:48:45,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 32 [2022-03-03 19:48:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:45,883 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 16 [2022-03-03 19:48:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:45,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:46,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:46,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:48:46,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:46,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:48:46,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:46,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:46,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:48:48,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:48,212 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 72 [2022-03-03 19:48:48,253 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:48:48,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:48:48,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:48,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:48:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:48,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932200266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:48,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:48,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:48:48,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647215172] [2022-03-03 19:48:48,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:48,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:48:48,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:48:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:48:48,612 INFO L87 Difference]: Start difference. First operand 4458 states and 15224 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:48:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:52,323 INFO L93 Difference]: Finished difference Result 8337 states and 26153 transitions. [2022-03-03 19:48:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 19:48:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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 30 [2022-03-03 19:48:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:52,341 INFO L225 Difference]: With dead ends: 8337 [2022-03-03 19:48:52,341 INFO L226 Difference]: Without dead ends: 8307 [2022-03-03 19:48:52,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1434, Invalid=6938, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:48:52,342 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 626 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:52,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 401 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:48:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8307 states. [2022-03-03 19:48:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8307 to 4475. [2022-03-03 19:48:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 3.4148413053196247) internal successors, (15278), 4474 states have internal predecessors, (15278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 15278 transitions. [2022-03-03 19:48:52,456 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 15278 transitions. Word has length 30 [2022-03-03 19:48:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:52,457 INFO L470 AbstractCegarLoop]: Abstraction has 4475 states and 15278 transitions. [2022-03-03 19:48:52,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:48:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 15278 transitions. [2022-03-03 19:48:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:52,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:52,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:52,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:48:52,664 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,SelfDestructingSolverStorable47 [2022-03-03 19:48:52,664 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -554871545, now seen corresponding path program 10 times [2022-03-03 19:48:52,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:52,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178554134] [2022-03-03 19:48:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:52,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:52,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178554134] [2022-03-03 19:48:52,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178554134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:52,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915087688] [2022-03-03 19:48:52,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:48:52,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:52,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:52,945 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) [2022-03-03 19:48:52,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:48:52,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:48:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:48:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:53,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-03 19:48:53,320 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:48:53,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:48:53,325 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 16 [2022-03-03 19:48:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:53,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:53,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:53,607 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 46 treesize of output 81 [2022-03-03 19:48:53,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:53,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:48:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:53,664 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:48:55,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:55,225 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 72 [2022-03-03 19:48:55,268 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:48:55,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:48:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:48:55,288 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 65 treesize of output 81 [2022-03-03 19:48:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:55,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915087688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:55,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:55,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:48:55,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966674439] [2022-03-03 19:48:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:55,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:48:55,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:48:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:48:55,717 INFO L87 Difference]: Start difference. First operand 4475 states and 15278 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:48:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,136 INFO L93 Difference]: Finished difference Result 8295 states and 26041 transitions. [2022-03-03 19:48:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:48:59,136 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-03 19:48:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,153 INFO L225 Difference]: With dead ends: 8295 [2022-03-03 19:48:59,153 INFO L226 Difference]: Without dead ends: 8265 [2022-03-03 19:48:59,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1415, Invalid=6417, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 19:48:59,154 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 693 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:59,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 326 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1754 Invalid, 0 Unknown, 95 Unchecked, 1.0s Time] [2022-03-03 19:48:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2022-03-03 19:48:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 4467. [2022-03-03 19:48:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4466 states have (on average 3.416256157635468) internal successors, (15257), 4466 states have internal predecessors, (15257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 15257 transitions. [2022-03-03 19:48:59,260 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 15257 transitions. Word has length 30 [2022-03-03 19:48:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,260 INFO L470 AbstractCegarLoop]: Abstraction has 4467 states and 15257 transitions. [2022-03-03 19:48:59,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:48:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 15257 transitions. [2022-03-03 19:48:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:59,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:59,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,468 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,468 INFO L85 PathProgramCache]: Analyzing trace with hash -173394005, now seen corresponding path program 11 times [2022-03-03 19:48:59,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430872254] [2022-03-03 19:48:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430872254] [2022-03-03 19:48:59,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430872254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:59,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963138944] [2022-03-03 19:48:59,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:48:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:59,742 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) [2022-03-03 19:48:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:48:59,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:48:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:59,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:48:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:00,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,103 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 35 [2022-03-03 19:49:00,116 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:49:00,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-03-03 19:49:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,119 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 21 [2022-03-03 19:49:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:00,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:49:00,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:00,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:49:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:00,519 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 97 treesize of output 111 [2022-03-03 19:49:01,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:01,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:01,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:01,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:49:01,293 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:49:01,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:49:01,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:01,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:01,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:01,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:49:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:01,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963138944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:01,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:01,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-03 19:49:01,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066405063] [2022-03-03 19:49:01,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:01,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:49:01,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:49:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:49:01,658 INFO L87 Difference]: Start difference. First operand 4467 states and 15257 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:11,709 INFO L93 Difference]: Finished difference Result 8893 states and 27493 transitions. [2022-03-03 19:49:11,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-03 19:49:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:11,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:11,726 INFO L225 Difference]: With dead ends: 8893 [2022-03-03 19:49:11,726 INFO L226 Difference]: Without dead ends: 8863 [2022-03-03 19:49:11,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2593, Invalid=19163, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:49:11,728 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 717 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:11,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 976 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-03 19:49:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8863 states. [2022-03-03 19:49:11,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8863 to 4476. [2022-03-03 19:49:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 3.4174301675977654) internal successors, (15293), 4475 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 15293 transitions. [2022-03-03 19:49:11,835 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 15293 transitions. Word has length 30 [2022-03-03 19:49:11,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:11,835 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 15293 transitions. [2022-03-03 19:49:11,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 15293 transitions. [2022-03-03 19:49:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:11,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:11,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:11,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 19:49:12,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:49:12,042 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash -242471051, now seen corresponding path program 12 times [2022-03-03 19:49:12,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:12,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252069967] [2022-03-03 19:49:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:12,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252069967] [2022-03-03 19:49:12,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252069967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:12,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051483120] [2022-03-03 19:49:12,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:12,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:12,336 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) [2022-03-03 19:49:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:49:12,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:49:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:49:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:14,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,253 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 48 treesize of output 56 [2022-03-03 19:49:14,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:49:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:14,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-03-03 19:49:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:14,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:14,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,928 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 84 treesize of output 101 [2022-03-03 19:49:14,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-03 19:49:14,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:14,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:14,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,979 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 91 treesize of output 99 [2022-03-03 19:49:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:15,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051483120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:15,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:15,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-03 19:49:15,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679983933] [2022-03-03 19:49:15,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:15,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:49:15,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:49:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1117, Unknown=2, NotChecked=0, Total=1260 [2022-03-03 19:49:15,676 INFO L87 Difference]: Start difference. First operand 4476 states and 15293 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:44,158 WARN L228 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 124 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:50:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:19,632 INFO L93 Difference]: Finished difference Result 12251 states and 40954 transitions. [2022-03-03 19:50:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-03 19:50:19,633 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:19,658 INFO L225 Difference]: With dead ends: 12251 [2022-03-03 19:50:19,658 INFO L226 Difference]: Without dead ends: 12221 [2022-03-03 19:50:19,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10030 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=3306, Invalid=24063, Unknown=21, NotChecked=0, Total=27390 [2022-03-03 19:50:19,660 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 667 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:19,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 879 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2598 Invalid, 0 Unknown, 2080 Unchecked, 1.4s Time] [2022-03-03 19:50:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12221 states. [2022-03-03 19:50:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12221 to 4581. [2022-03-03 19:50:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.427292576419214) internal successors, (15697), 4580 states have internal predecessors, (15697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 15697 transitions. [2022-03-03 19:50:19,790 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 15697 transitions. Word has length 30 [2022-03-03 19:50:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:19,790 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 15697 transitions. [2022-03-03 19:50:19,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 15697 transitions. [2022-03-03 19:50:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:19,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:19,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:19,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:19,998 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1966576565, now seen corresponding path program 13 times [2022-03-03 19:50:19,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:19,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081162011] [2022-03-03 19:50:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:20,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:20,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081162011] [2022-03-03 19:50:20,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081162011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:20,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542169707] [2022-03-03 19:50:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:20,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:20,313 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) [2022-03-03 19:50:20,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:50:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:50:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:20,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-03 19:50:20,660 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:50:20,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 34 [2022-03-03 19:50:20,663 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 16 [2022-03-03 19:50:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:20,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:21,036 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:50:21,036 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 46 treesize of output 81 [2022-03-03 19:50:21,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:21,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:50:21,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:21,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:21,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:50:22,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:22,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:22,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:50:22,932 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:50:22,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:50:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:22,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:22,955 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 65 treesize of output 81 [2022-03-03 19:50:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:23,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542169707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:23,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:23,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:50:23,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938542928] [2022-03-03 19:50:23,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:50:23,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:50:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:50:23,469 INFO L87 Difference]: Start difference. First operand 4581 states and 15697 transitions. Second operand has 32 states, 32 states have (on average 2.15625) 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) [2022-03-03 19:50:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:30,204 INFO L93 Difference]: Finished difference Result 9097 states and 29208 transitions. [2022-03-03 19:50:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:50:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) 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 30 [2022-03-03 19:50:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:30,223 INFO L225 Difference]: With dead ends: 9097 [2022-03-03 19:50:30,223 INFO L226 Difference]: Without dead ends: 9063 [2022-03-03 19:50:30,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3651 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1440, Invalid=10116, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 19:50:30,224 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 608 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 3670 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 3884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:30,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 625 Invalid, 3884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3670 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:50:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9063 states. [2022-03-03 19:50:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9063 to 4616. [2022-03-03 19:50:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 3.4238353196099673) internal successors, (15801), 4615 states have internal predecessors, (15801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 15801 transitions. [2022-03-03 19:50:30,329 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 15801 transitions. Word has length 30 [2022-03-03 19:50:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 4616 states and 15801 transitions. [2022-03-03 19:50:30,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) 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) [2022-03-03 19:50:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 15801 transitions. [2022-03-03 19:50:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:30,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:30,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:30,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:30,537 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,SelfDestructingSolverStorable51 [2022-03-03 19:50:30,537 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 857420597, now seen corresponding path program 14 times [2022-03-03 19:50:30,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:30,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657164167] [2022-03-03 19:50:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:30,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:30,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657164167] [2022-03-03 19:50:30,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657164167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:30,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845138512] [2022-03-03 19:50:30,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:30,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:30,849 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) [2022-03-03 19:50:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:50:30,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:30,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:50:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:31,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:31,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 58 [2022-03-03 19:50:31,290 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:50:31,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-03 19:50:31,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:31,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-03-03 19:50:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:31,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,086 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 46 treesize of output 73 [2022-03-03 19:50:32,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:50:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,134 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 97 treesize of output 103 [2022-03-03 19:50:33,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:33,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 35 [2022-03-03 19:50:33,346 INFO L353 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-03-03 19:50:33,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 35 [2022-03-03 19:50:33,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:33,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:50:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:33,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845138512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:33,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:33,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-03 19:50:33,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034050474] [2022-03-03 19:50:33,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:33,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:50:33,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:50:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:50:33,472 INFO L87 Difference]: Start difference. First operand 4616 states and 15801 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:54,132 INFO L93 Difference]: Finished difference Result 11751 states and 37816 transitions. [2022-03-03 19:50:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-03 19:50:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:54,156 INFO L225 Difference]: With dead ends: 11751 [2022-03-03 19:50:54,157 INFO L226 Difference]: Without dead ends: 11698 [2022-03-03 19:50:54,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22128 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=7340, Invalid=46716, Unknown=0, NotChecked=0, Total=54056 [2022-03-03 19:50:54,160 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1194 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 7484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1517 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:54,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 1630 Invalid, 7484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 5549 Invalid, 0 Unknown, 1517 Unchecked, 3.1s Time] [2022-03-03 19:50:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11698 states. [2022-03-03 19:50:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11698 to 4650. [2022-03-03 19:50:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 3.4314906431490644) internal successors, (15953), 4649 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 15953 transitions. [2022-03-03 19:50:54,298 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 15953 transitions. Word has length 30 [2022-03-03 19:50:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 15953 transitions. [2022-03-03 19:50:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 15953 transitions. [2022-03-03 19:50:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:54,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:54,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:54,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 19:50:54,506 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,SelfDestructingSolverStorable52 [2022-03-03 19:50:54,506 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1825899231, now seen corresponding path program 15 times [2022-03-03 19:50:54,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:54,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901623836] [2022-03-03 19:50:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:54,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:54,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901623836] [2022-03-03 19:50:54,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901623836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:54,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200940035] [2022-03-03 19:50:54,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:54,774 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) [2022-03-03 19:50:54,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:50:54,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:50:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:55,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:55,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:55,128 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 45 treesize of output 53 [2022-03-03 19:50:55,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:55,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 61 [2022-03-03 19:50:55,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:55,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:55,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 71 [2022-03-03 19:50:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:58,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:58,270 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 84 treesize of output 117 [2022-03-03 19:50:58,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:58,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-03 19:50:58,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:58,327 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 91 treesize of output 115 [2022-03-03 19:51:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:07,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200940035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:07,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:07,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-03 19:51:07,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296140400] [2022-03-03 19:51:07,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:07,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:51:07,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:51:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=711, Unknown=2, NotChecked=0, Total=870 [2022-03-03 19:51:07,346 INFO L87 Difference]: Start difference. First operand 4650 states and 15953 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:52:00,018 WARN L228 SmtUtils]: Spent 40.62s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:52:16,453 WARN L228 SmtUtils]: Spent 13.25s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:52:26,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:26,223 INFO L93 Difference]: Finished difference Result 9083 states and 28913 transitions. [2022-03-03 19:52:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 19:52:26,224 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 30 [2022-03-03 19:52:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:26,242 INFO L225 Difference]: With dead ends: 9083 [2022-03-03 19:52:26,243 INFO L226 Difference]: Without dead ends: 9038 [2022-03-03 19:52:26,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4912 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=2289, Invalid=10126, Unknown=17, NotChecked=0, Total=12432 [2022-03-03 19:52:26,244 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 608 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1306 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:26,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 448 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1430 Invalid, 0 Unknown, 1306 Unchecked, 0.9s Time] [2022-03-03 19:52:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9038 states. [2022-03-03 19:52:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9038 to 4652. [2022-03-03 19:52:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 3.431950118254139) internal successors, (15962), 4651 states have internal predecessors, (15962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 15962 transitions. [2022-03-03 19:52:26,373 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 15962 transitions. Word has length 30 [2022-03-03 19:52:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:26,373 INFO L470 AbstractCegarLoop]: Abstraction has 4652 states and 15962 transitions. [2022-03-03 19:52:26,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:52:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 15962 transitions. [2022-03-03 19:52:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:26,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:26,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:26,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 19:52:26,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:26,581 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1512143957, now seen corresponding path program 16 times [2022-03-03 19:52:26,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:26,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537501142] [2022-03-03 19:52:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:26,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:26,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537501142] [2022-03-03 19:52:26,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537501142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:26,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662831115] [2022-03-03 19:52:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:26,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:26,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:26,860 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) [2022-03-03 19:52:26,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:52:26,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:52:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:27,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-03 19:52:27,220 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:52:27,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 32 [2022-03-03 19:52:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:52:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:27,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:52:27,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:52:27,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:52:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:29,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:29,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:52:29,405 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:52:29,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:52:29,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:29,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:29,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:29,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:52:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:29,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662831115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:29,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:29,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:52:29,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258877328] [2022-03-03 19:52:29,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:29,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:52:29,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:29,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:52:29,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:52:29,791 INFO L87 Difference]: Start difference. First operand 4652 states and 15962 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:52:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:35,005 INFO L93 Difference]: Finished difference Result 10341 states and 31975 transitions. [2022-03-03 19:52:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:52:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-03 19:52:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:35,027 INFO L225 Difference]: With dead ends: 10341 [2022-03-03 19:52:35,027 INFO L226 Difference]: Without dead ends: 10311 [2022-03-03 19:52:35,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2146, Invalid=8566, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:52:35,028 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 868 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:35,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 460 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2079 Invalid, 0 Unknown, 33 Unchecked, 1.2s Time] [2022-03-03 19:52:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2022-03-03 19:52:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 4677. [2022-03-03 19:52:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 3.4362703165098374) internal successors, (16068), 4676 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 16068 transitions. [2022-03-03 19:52:35,147 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 16068 transitions. Word has length 30 [2022-03-03 19:52:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:35,147 INFO L470 AbstractCegarLoop]: Abstraction has 4677 states and 16068 transitions. [2022-03-03 19:52:35,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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) [2022-03-03 19:52:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 16068 transitions. [2022-03-03 19:52:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:35,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:35,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:35,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:35,354 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,SelfDestructingSolverStorable54 [2022-03-03 19:52:35,355 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1089229415, now seen corresponding path program 17 times [2022-03-03 19:52:35,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:35,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371384305] [2022-03-03 19:52:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:35,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:35,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371384305] [2022-03-03 19:52:35,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371384305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:35,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107141840] [2022-03-03 19:52:35,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:35,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:35,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:35,645 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) [2022-03-03 19:52:35,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:52:35,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:52:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:36,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:36,043 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 45 treesize of output 37 [2022-03-03 19:52:36,058 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:52:36,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 32 [2022-03-03 19:52:36,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:36,061 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 16 [2022-03-03 19:52:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:36,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:36,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:36,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:52:36,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:36,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:52:36,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:36,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:36,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:52:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,159 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 72 [2022-03-03 19:52:38,203 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:52:38,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:52:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:38,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,228 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 65 treesize of output 81 [2022-03-03 19:52:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:38,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107141840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:38,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:38,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-03 19:52:38,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286708944] [2022-03-03 19:52:38,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:38,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:52:38,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:52:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:52:38,625 INFO L87 Difference]: Start difference. First operand 4677 states and 16068 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:52:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:48,740 INFO L93 Difference]: Finished difference Result 12615 states and 38355 transitions. [2022-03-03 19:52:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-03 19:52:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-03 19:52:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:48,766 INFO L225 Difference]: With dead ends: 12615 [2022-03-03 19:52:48,766 INFO L226 Difference]: Without dead ends: 12585 [2022-03-03 19:52:48,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11900 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4342, Invalid=23714, Unknown=0, NotChecked=0, Total=28056 [2022-03-03 19:52:48,768 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 778 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 2662 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:48,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 787 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2662 Invalid, 0 Unknown, 1027 Unchecked, 1.6s Time] [2022-03-03 19:52:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12585 states. [2022-03-03 19:52:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12585 to 4679. [2022-03-03 19:52:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.436725096194955) internal successors, (16077), 4678 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 16077 transitions. [2022-03-03 19:52:48,916 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 16077 transitions. Word has length 30 [2022-03-03 19:52:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 16077 transitions. [2022-03-03 19:52:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:52:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 16077 transitions. [2022-03-03 19:52:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:48,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:48,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:48,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-03 19:52:49,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:52:49,124 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1400189745, now seen corresponding path program 18 times [2022-03-03 19:52:49,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:49,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471716211] [2022-03-03 19:52:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:49,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:49,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:49,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471716211] [2022-03-03 19:52:49,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471716211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:49,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014599535] [2022-03-03 19:52:49,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:49,398 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) [2022-03-03 19:52:49,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:52:49,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:52:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:52:49,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:49,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:49,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-03 19:52:49,759 INFO L353 Elim1Store]: treesize reduction 45, result has 57.1 percent of original size [2022-03-03 19:52:49,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 72 [2022-03-03 19:52:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:49,767 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 75 treesize of output 65 [2022-03-03 19:52:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:50,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:50,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:50,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:52:50,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:50,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:52:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:50,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:50,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:52:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:52,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:52,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:52,101 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 72 [2022-03-03 19:52:52,145 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:52:52,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:52:52,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:52,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:52,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:52:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:52,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014599535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:52,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:52,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-03 19:52:52,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380521799] [2022-03-03 19:52:52,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:52,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:52:52,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:52:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:52:52,579 INFO L87 Difference]: Start difference. First operand 4679 states and 16077 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:52:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:58,283 INFO L93 Difference]: Finished difference Result 11343 states and 35448 transitions. [2022-03-03 19:52:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-03 19:52:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 30 [2022-03-03 19:52:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:58,306 INFO L225 Difference]: With dead ends: 11343 [2022-03-03 19:52:58,307 INFO L226 Difference]: Without dead ends: 11313 [2022-03-03 19:52:58,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5087 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2546, Invalid=10336, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 19:52:58,308 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 898 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:58,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 536 Invalid, 3425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2390 Invalid, 0 Unknown, 713 Unchecked, 1.3s Time] [2022-03-03 19:52:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-03-03 19:52:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 4691. [2022-03-03 19:52:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 3.438592750533049) internal successors, (16127), 4690 states have internal predecessors, (16127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 16127 transitions. [2022-03-03 19:52:58,441 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 16127 transitions. Word has length 30 [2022-03-03 19:52:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:58,441 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 16127 transitions. [2022-03-03 19:52:58,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:52:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 16127 transitions. [2022-03-03 19:52:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:58,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:58,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:58,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:58,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:58,650 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:58,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2132440842, now seen corresponding path program 37 times [2022-03-03 19:52:58,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:58,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660394762] [2022-03-03 19:52:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:59,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:59,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660394762] [2022-03-03 19:52:59,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660394762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:59,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357592372] [2022-03-03 19:52:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:59,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:59,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:59,095 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) [2022-03-03 19:52:59,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:52:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:59,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:59,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:59,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:59,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:59,491 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 54 treesize of output 44 [2022-03-03 19:52:59,509 INFO L353 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-03-03 19:52:59,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 44 treesize of output 40 [2022-03-03 19:52:59,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:52:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:59,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:59,804 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:59,804 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 49 treesize of output 74 [2022-03-03 19:52:59,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:59,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 112 [2022-03-03 19:52:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:59,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:59,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 107 [2022-03-03 19:53:00,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:00,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:00,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 38 [2022-03-03 19:53:00,471 INFO L353 Elim1Store]: treesize reduction 71, result has 26.8 percent of original size [2022-03-03 19:53:00,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 36 [2022-03-03 19:53:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:00,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-03-03 19:53:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:00,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357592372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:00,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:00,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-03 19:53:00,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305267724] [2022-03-03 19:53:00,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:53:00,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:53:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:00,572 INFO L87 Difference]: Start difference. First operand 4691 states and 16127 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:07,001 INFO L93 Difference]: Finished difference Result 8272 states and 27313 transitions. [2022-03-03 19:53:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:53:07,002 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:07,020 INFO L225 Difference]: With dead ends: 8272 [2022-03-03 19:53:07,020 INFO L226 Difference]: Without dead ends: 8225 [2022-03-03 19:53:07,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1591, Invalid=9539, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:53:07,021 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 556 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 2975 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:07,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 533 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2975 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:53:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2022-03-03 19:53:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 4688. [2022-03-03 19:53:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.4384467676552166) internal successors, (16116), 4687 states have internal predecessors, (16116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16116 transitions. [2022-03-03 19:53:07,144 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16116 transitions. Word has length 30 [2022-03-03 19:53:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:07,144 INFO L470 AbstractCegarLoop]: Abstraction has 4688 states and 16116 transitions. [2022-03-03 19:53:07,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16116 transitions. [2022-03-03 19:53:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:07,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:07,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:07,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:07,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:07,352 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1956652829, now seen corresponding path program 19 times [2022-03-03 19:53:07,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:07,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871286996] [2022-03-03 19:53:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:07,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:07,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871286996] [2022-03-03 19:53:07,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871286996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:07,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014580084] [2022-03-03 19:53:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:07,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:07,617 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) [2022-03-03 19:53:07,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:53:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:53:07,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:07,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:07,936 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 48 treesize of output 48 [2022-03-03 19:53:07,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:07,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:53:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:07,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:07,957 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 67 treesize of output 63 [2022-03-03 19:53:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:08,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:08,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:08,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:08,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:53:08,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:08,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:53:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:08,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:08,369 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 97 treesize of output 111 [2022-03-03 19:53:09,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:09,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:09,334 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 72 [2022-03-03 19:53:09,402 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:53:09,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:53:09,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:09,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:09,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:09,425 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 65 treesize of output 81 [2022-03-03 19:53:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:09,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014580084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:09,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:09,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-03 19:53:09,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046373743] [2022-03-03 19:53:09,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:09,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:53:09,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:09,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:53:09,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:53:09,789 INFO L87 Difference]: Start difference. First operand 4688 states and 16116 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:53:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:16,389 INFO L93 Difference]: Finished difference Result 11545 states and 35977 transitions. [2022-03-03 19:53:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:53:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 30 [2022-03-03 19:53:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:16,416 INFO L225 Difference]: With dead ends: 11545 [2022-03-03 19:53:16,417 INFO L226 Difference]: Without dead ends: 11530 [2022-03-03 19:53:16,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5815 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2831, Invalid=12421, Unknown=0, NotChecked=0, Total=15252 [2022-03-03 19:53:16,418 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 991 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2645 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:16,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 581 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2645 Invalid, 0 Unknown, 532 Unchecked, 1.5s Time] [2022-03-03 19:53:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11530 states. [2022-03-03 19:53:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11530 to 4686. [2022-03-03 19:53:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 3.437993596584845) internal successors, (16107), 4685 states have internal predecessors, (16107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 16107 transitions. [2022-03-03 19:53:16,552 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 16107 transitions. Word has length 30 [2022-03-03 19:53:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:16,552 INFO L470 AbstractCegarLoop]: Abstraction has 4686 states and 16107 transitions. [2022-03-03 19:53:16,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:53:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 16107 transitions. [2022-03-03 19:53:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:16,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:16,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:16,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 19:53:16,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:16,760 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1686862121, now seen corresponding path program 20 times [2022-03-03 19:53:16,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:16,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909595092] [2022-03-03 19:53:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:16,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:17,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:17,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909595092] [2022-03-03 19:53:17,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909595092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:17,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293866748] [2022-03-03 19:53:17,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:53:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:17,072 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) [2022-03-03 19:53:17,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:53:17,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:53:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:53:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:17,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:17,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 51 [2022-03-03 19:53:17,478 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:53:17,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 62 [2022-03-03 19:53:17,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:17,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 67 treesize of output 71 [2022-03-03 19:53:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:17,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:18,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:18,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:18,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:18,224 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 46 treesize of output 73 [2022-03-03 19:53:18,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:18,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:53:18,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:18,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:18,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:18,273 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 97 treesize of output 103 [2022-03-03 19:53:19,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:19,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 35 [2022-03-03 19:53:19,222 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-03-03 19:53:19,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 33 [2022-03-03 19:53:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:19,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:53:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:19,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293866748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:19,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:19,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-03 19:53:19,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361933628] [2022-03-03 19:53:19,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:19,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:53:19,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:53:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:19,347 INFO L87 Difference]: Start difference. First operand 4686 states and 16107 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:38,429 INFO L93 Difference]: Finished difference Result 10991 states and 35565 transitions. [2022-03-03 19:53:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-03-03 19:53:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:38,480 INFO L225 Difference]: With dead ends: 10991 [2022-03-03 19:53:38,480 INFO L226 Difference]: Without dead ends: 10917 [2022-03-03 19:53:38,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22062 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=6063, Invalid=48927, Unknown=0, NotChecked=0, Total=54990 [2022-03-03 19:53:38,482 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1087 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 5397 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 7353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 5397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:38,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1626 Invalid, 7353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 5397 Invalid, 0 Unknown, 1551 Unchecked, 3.1s Time] [2022-03-03 19:53:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2022-03-03 19:53:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 4709. [2022-03-03 19:53:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.441163976210705) internal successors, (16201), 4708 states have internal predecessors, (16201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 16201 transitions. [2022-03-03 19:53:38,596 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 16201 transitions. Word has length 30 [2022-03-03 19:53:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:38,596 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 16201 transitions. [2022-03-03 19:53:38,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 16201 transitions. [2022-03-03 19:53:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:38,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:38,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:38,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 19:53:38,803 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,SelfDestructingSolverStorable59 [2022-03-03 19:53:38,804 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -738691041, now seen corresponding path program 21 times [2022-03-03 19:53:38,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:38,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6165448] [2022-03-03 19:53:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:39,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:39,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6165448] [2022-03-03 19:53:39,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6165448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:39,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080802955] [2022-03-03 19:53:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:39,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:39,113 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) [2022-03-03 19:53:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:53:39,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:53:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:53:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:41,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:41,496 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 48 treesize of output 40 [2022-03-03 19:53:41,510 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:53:41,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:53:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:41,521 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 16 [2022-03-03 19:53:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:41,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:42,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:42,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 116 [2022-03-03 19:53:42,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:42,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 110 [2022-03-03 19:53:42,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:42,140 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 91 treesize of output 115 [2022-03-03 19:53:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:47,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080802955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:47,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:47,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:53:47,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767391763] [2022-03-03 19:53:47,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:53:47,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:53:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=787, Unknown=2, NotChecked=0, Total=930 [2022-03-03 19:53:47,523 INFO L87 Difference]: Start difference. First operand 4709 states and 16201 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) 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) [2022-03-03 19:54:00,405 WARN L228 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-03 19:54:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:03,891 INFO L93 Difference]: Finished difference Result 8812 states and 27942 transitions. [2022-03-03 19:54:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:54:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) 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 30 [2022-03-03 19:54:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:03,910 INFO L225 Difference]: With dead ends: 8812 [2022-03-03 19:54:03,911 INFO L226 Difference]: Without dead ends: 8755 [2022-03-03 19:54:03,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1275, Invalid=6729, Unknown=6, NotChecked=0, Total=8010 [2022-03-03 19:54:03,912 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 439 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 3035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 946 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:03,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 377 Invalid, 3035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1937 Invalid, 0 Unknown, 946 Unchecked, 1.0s Time] [2022-03-03 19:54:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8755 states. [2022-03-03 19:54:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8755 to 4731. [2022-03-03 19:54:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4730 states have (on average 3.441860465116279) internal successors, (16280), 4730 states have internal predecessors, (16280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 16280 transitions. [2022-03-03 19:54:04,042 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 16280 transitions. Word has length 30 [2022-03-03 19:54:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:04,042 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 16280 transitions. [2022-03-03 19:54:04,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) 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) [2022-03-03 19:54:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 16280 transitions. [2022-03-03 19:54:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:04,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:04,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:04,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:04,250 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,SelfDestructingSolverStorable60 [2022-03-03 19:54:04,250 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -822012935, now seen corresponding path program 22 times [2022-03-03 19:54:04,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:04,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202715637] [2022-03-03 19:54:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:04,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:04,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202715637] [2022-03-03 19:54:04,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202715637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:04,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923461328] [2022-03-03 19:54:04,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:04,554 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) [2022-03-03 19:54:04,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:54:04,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:54:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:04,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:04,881 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 43 treesize of output 43 [2022-03-03 19:54:04,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:04,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:54:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:04,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:04,904 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 67 treesize of output 63 [2022-03-03 19:54:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:05,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:05,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:05,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:54:05,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:05,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:54:05,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:05,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:05,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:54:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:06,418 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 72 [2022-03-03 19:54:06,463 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:54:06,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:54:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:06,486 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 65 treesize of output 81 [2022-03-03 19:54:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:06,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923461328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:06,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:06,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:54:06,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585988265] [2022-03-03 19:54:06,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:54:06,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:54:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:06,877 INFO L87 Difference]: Start difference. First operand 4731 states and 16280 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:54:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:13,522 INFO L93 Difference]: Finished difference Result 9934 states and 31252 transitions. [2022-03-03 19:54:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-03 19:54:13,523 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 30 [2022-03-03 19:54:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:13,542 INFO L225 Difference]: With dead ends: 9934 [2022-03-03 19:54:13,542 INFO L226 Difference]: Without dead ends: 9833 [2022-03-03 19:54:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6182 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2456, Invalid=14314, Unknown=0, NotChecked=0, Total=16770 [2022-03-03 19:54:13,544 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 582 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 555 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:54:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2022-03-03 19:54:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 4765. [2022-03-03 19:54:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 4764 states have (on average 3.445424013434089) internal successors, (16414), 4764 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 16414 transitions. [2022-03-03 19:54:13,661 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 16414 transitions. Word has length 30 [2022-03-03 19:54:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:13,662 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 16414 transitions. [2022-03-03 19:54:13,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:54:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 16414 transitions. [2022-03-03 19:54:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:13,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:13,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:13,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 19:54:13,869 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,SelfDestructingSolverStorable61 [2022-03-03 19:54:13,869 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash -460915169, now seen corresponding path program 23 times [2022-03-03 19:54:13,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:13,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408552742] [2022-03-03 19:54:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:13,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:14,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:14,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408552742] [2022-03-03 19:54:14,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408552742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:14,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39467922] [2022-03-03 19:54:14,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:14,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:14,254 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) [2022-03-03 19:54:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:54:14,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:54:14,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:14,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:14,544 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 60 treesize of output 56 [2022-03-03 19:54:14,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:14,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2022-03-03 19:54:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:14,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:14,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2022-03-03 19:54:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:14,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:15,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:15,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:15,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:54:15,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:15,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:54:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:15,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:15,078 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 97 treesize of output 111 [2022-03-03 19:54:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:16,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:16,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:16,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:54:16,130 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:54:16,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:54:16,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:16,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:16,152 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 65 treesize of output 81 [2022-03-03 19:54:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:16,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39467922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:16,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:16,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 33 [2022-03-03 19:54:16,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951774021] [2022-03-03 19:54:16,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:54:16,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:54:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:54:16,493 INFO L87 Difference]: Start difference. First operand 4765 states and 16414 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2022-03-03 19:54:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:22,772 INFO L93 Difference]: Finished difference Result 9074 states and 28716 transitions. [2022-03-03 19:54:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 19:54:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 30 [2022-03-03 19:54:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:22,790 INFO L225 Difference]: With dead ends: 9074 [2022-03-03 19:54:22,790 INFO L226 Difference]: Without dead ends: 8918 [2022-03-03 19:54:22,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3706 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1685, Invalid=10525, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:54:22,791 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 540 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:22,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 619 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2939 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:54:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2022-03-03 19:54:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 4772. [2022-03-03 19:54:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4771 states have (on average 3.446028086355062) internal successors, (16441), 4771 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 16441 transitions. [2022-03-03 19:54:22,901 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 16441 transitions. Word has length 30 [2022-03-03 19:54:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:22,902 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 16441 transitions. [2022-03-03 19:54:22,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2022-03-03 19:54:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 16441 transitions. [2022-03-03 19:54:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:22,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:22,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:22,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-03 19:54:23,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:23,111 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:23,111 INFO L85 PathProgramCache]: Analyzing trace with hash 791616355, now seen corresponding path program 24 times [2022-03-03 19:54:23,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:23,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134244244] [2022-03-03 19:54:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:23,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:23,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:23,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134244244] [2022-03-03 19:54:23,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134244244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:23,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219240508] [2022-03-03 19:54:23,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:23,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:23,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:23,447 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) [2022-03-03 19:54:23,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:54:23,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:54:23,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:23,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:23,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-03-03 19:54:23,795 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:54:23,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 64 [2022-03-03 19:54:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:23,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:23,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:54:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:23,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:24,274 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:24,274 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 46 treesize of output 81 [2022-03-03 19:54:24,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:24,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:54:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:24,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:24,328 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 97 treesize of output 111 [2022-03-03 19:54:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:26,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:26,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:54:26,175 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:54:26,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:54:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:26,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:26,215 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 65 treesize of output 81 [2022-03-03 19:54:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:26,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219240508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:26,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:26,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:54:26,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117624555] [2022-03-03 19:54:26,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:26,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:54:26,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:54:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:54:26,533 INFO L87 Difference]: Start difference. First operand 4772 states and 16441 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:31,427 INFO L93 Difference]: Finished difference Result 9686 states and 31179 transitions. [2022-03-03 19:54:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:54:31,427 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:31,447 INFO L225 Difference]: With dead ends: 9686 [2022-03-03 19:54:31,447 INFO L226 Difference]: Without dead ends: 9568 [2022-03-03 19:54:31,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1210, Invalid=9296, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:54:31,448 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 559 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:31,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 580 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3024 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:54:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2022-03-03 19:54:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 4803. [2022-03-03 19:54:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.4448146605581007) internal successors, (16542), 4802 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16542 transitions. [2022-03-03 19:54:31,597 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16542 transitions. Word has length 30 [2022-03-03 19:54:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:31,597 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16542 transitions. [2022-03-03 19:54:31,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16542 transitions. [2022-03-03 19:54:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:31,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:31,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:31,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 19:54:31,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:31,806 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash 784192023, now seen corresponding path program 25 times [2022-03-03 19:54:31,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:31,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143939251] [2022-03-03 19:54:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:32,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:32,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143939251] [2022-03-03 19:54:32,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143939251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:32,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454367069] [2022-03-03 19:54:32,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:32,144 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) [2022-03-03 19:54:32,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:54:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:54:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,511 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 48 treesize of output 40 [2022-03-03 19:54:32,525 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:54:32,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:54:32,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:54:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:32,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:32,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 81 [2022-03-03 19:54:32,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:54:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,907 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 97 treesize of output 111 [2022-03-03 19:54:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:34,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:34,380 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 72 [2022-03-03 19:54:34,423 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:54:34,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:54:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:34,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:34,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:34,444 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 65 treesize of output 81 [2022-03-03 19:54:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:34,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454367069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:34,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:34,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:54:34,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989573413] [2022-03-03 19:54:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:34,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:54:34,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:54:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:54:34,828 INFO L87 Difference]: Start difference. First operand 4803 states and 16542 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:54:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:39,643 INFO L93 Difference]: Finished difference Result 10397 states and 31892 transitions. [2022-03-03 19:54:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:54:39,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 30 [2022-03-03 19:54:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:39,663 INFO L225 Difference]: With dead ends: 10397 [2022-03-03 19:54:39,663 INFO L226 Difference]: Without dead ends: 10367 [2022-03-03 19:54:39,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2285, Invalid=8635, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:54:39,664 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 832 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:39,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 431 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1919 Invalid, 0 Unknown, 234 Unchecked, 1.2s Time] [2022-03-03 19:54:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10367 states. [2022-03-03 19:54:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10367 to 4820. [2022-03-03 19:54:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4819 states have (on average 3.449678356505499) internal successors, (16624), 4819 states have internal predecessors, (16624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 16624 transitions. [2022-03-03 19:54:39,778 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 16624 transitions. Word has length 30 [2022-03-03 19:54:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:39,779 INFO L470 AbstractCegarLoop]: Abstraction has 4820 states and 16624 transitions. [2022-03-03 19:54:39,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:54:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 16624 transitions. [2022-03-03 19:54:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:39,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:39,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:39,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 19:54:39,986 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,SelfDestructingSolverStorable64 [2022-03-03 19:54:39,987 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash -909401901, now seen corresponding path program 26 times [2022-03-03 19:54:39,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:39,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232348643] [2022-03-03 19:54:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:40,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:40,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232348643] [2022-03-03 19:54:40,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232348643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:40,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272326707] [2022-03-03 19:54:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:40,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:40,329 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) [2022-03-03 19:54:40,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:54:40,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:40,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:54:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:40,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:40,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2022-03-03 19:54:40,637 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:54:40,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 42 treesize of output 69 [2022-03-03 19:54:40,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:40,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:40,644 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:54:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:40,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:41,070 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:41,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:54:41,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:41,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:54:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:41,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:41,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:54:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:42,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:42,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:42,689 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 72 [2022-03-03 19:54:42,732 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:54:42,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:54:42,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:42,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:42,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:54:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:43,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272326707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:43,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:43,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:54:43,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052131683] [2022-03-03 19:54:43,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:43,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:54:43,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:54:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:54:43,164 INFO L87 Difference]: Start difference. First operand 4820 states and 16624 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:50,735 INFO L93 Difference]: Finished difference Result 10094 states and 32208 transitions. [2022-03-03 19:54:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:54:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:50,756 INFO L225 Difference]: With dead ends: 10094 [2022-03-03 19:54:50,756 INFO L226 Difference]: Without dead ends: 10035 [2022-03-03 19:54:50,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6117 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2135, Invalid=15421, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 19:54:50,757 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 718 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 3493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:50,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 754 Invalid, 3493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:54:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2022-03-03 19:54:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 4803. [2022-03-03 19:54:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.445855893377759) internal successors, (16547), 4802 states have internal predecessors, (16547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 16547 transitions. [2022-03-03 19:54:50,914 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 16547 transitions. Word has length 30 [2022-03-03 19:54:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:50,914 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 16547 transitions. [2022-03-03 19:54:50,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 16547 transitions. [2022-03-03 19:54:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:50,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:50,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:50,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:51,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 19:54:51,121 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -980079081, now seen corresponding path program 27 times [2022-03-03 19:54:51,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:51,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349053361] [2022-03-03 19:54:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:51,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:51,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349053361] [2022-03-03 19:54:51,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349053361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:51,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627121806] [2022-03-03 19:54:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:51,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:51,397 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) [2022-03-03 19:54:51,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:54:51,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:54:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:58,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:58,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2022-03-03 19:54:58,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:58,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:54:58,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:58,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-03-03 19:54:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:09,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:09,696 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 84 treesize of output 117 [2022-03-03 19:55:09,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:09,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-03 19:55:09,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:09,754 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 91 treesize of output 115 [2022-03-03 19:55:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:16,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627121806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:16,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:16,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-03 19:55:16,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191139382] [2022-03-03 19:55:16,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:16,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:55:16,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:16,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:55:16,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=904, Unknown=15, NotChecked=0, Total=1056 [2022-03-03 19:55:16,146 INFO L87 Difference]: Start difference. First operand 4803 states and 16547 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:51,860 INFO L93 Difference]: Finished difference Result 7463 states and 24999 transitions. [2022-03-03 19:55:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:55:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:51,875 INFO L225 Difference]: With dead ends: 7463 [2022-03-03 19:55:51,875 INFO L226 Difference]: Without dead ends: 7456 [2022-03-03 19:55:51,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=596, Invalid=3542, Unknown=22, NotChecked=0, Total=4160 [2022-03-03 19:55:51,876 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 325 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:51,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 402 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1359 Invalid, 0 Unknown, 739 Unchecked, 0.7s Time] [2022-03-03 19:55:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-03-03 19:55:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 4807. [2022-03-03 19:55:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4807 states, 4806 states have (on average 3.4454848106533498) internal successors, (16559), 4806 states have internal predecessors, (16559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4807 states to 4807 states and 16559 transitions. [2022-03-03 19:55:51,974 INFO L78 Accepts]: Start accepts. Automaton has 4807 states and 16559 transitions. Word has length 30 [2022-03-03 19:55:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 4807 states and 16559 transitions. [2022-03-03 19:55:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4807 states and 16559 transitions. [2022-03-03 19:55:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:51,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:51,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:51,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:55:52,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:52,182 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1990099571, now seen corresponding path program 28 times [2022-03-03 19:55:52,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:52,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153684150] [2022-03-03 19:55:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:52,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:52,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153684150] [2022-03-03 19:55:52,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153684150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:52,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487884608] [2022-03-03 19:55:52,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:52,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:52,444 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) [2022-03-03 19:55:52,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:55:52,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:52,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:52,833 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 47 treesize of output 39 [2022-03-03 19:55:52,846 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:55:52,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 34 [2022-03-03 19:55:52,851 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 16 [2022-03-03 19:55:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:52,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:53,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:53,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:55:53,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:55:53,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:53,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:53,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:55:55,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:55,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:55:55,378 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:55:55,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:55:55,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:55,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:55,398 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 65 treesize of output 81 [2022-03-03 19:55:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:55,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487884608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:55,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:55,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:55:55,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367900042] [2022-03-03 19:55:55,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:55,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:55,756 INFO L87 Difference]: Start difference. First operand 4807 states and 16559 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:55:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:58,458 INFO L93 Difference]: Finished difference Result 7801 states and 25123 transitions. [2022-03-03 19:55:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:55:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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 30 [2022-03-03 19:55:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:58,474 INFO L225 Difference]: With dead ends: 7801 [2022-03-03 19:55:58,474 INFO L226 Difference]: Without dead ends: 7771 [2022-03-03 19:55:58,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=855, Invalid=4997, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:55:58,475 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 413 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:58,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 297 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:55:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2022-03-03 19:55:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 4813. [2022-03-03 19:55:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4457605985037407) internal successors, (16581), 4812 states have internal predecessors, (16581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16581 transitions. [2022-03-03 19:55:58,573 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16581 transitions. Word has length 30 [2022-03-03 19:55:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:58,573 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16581 transitions. [2022-03-03 19:55:58,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:55:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16581 transitions. [2022-03-03 19:55:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:58,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:58,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:58,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:55:58,781 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,SelfDestructingSolverStorable67 [2022-03-03 19:55:58,782 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2065974609, now seen corresponding path program 29 times [2022-03-03 19:55:58,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:58,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090412944] [2022-03-03 19:55:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:59,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:59,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090412944] [2022-03-03 19:55:59,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090412944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:59,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286984747] [2022-03-03 19:55:59,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:59,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:59,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:59,060 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) [2022-03-03 19:55:59,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:55:59,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:55:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:55:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:59,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:59,442 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 50 treesize of output 42 [2022-03-03 19:55:59,455 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:55:59,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:55:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:59,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:55:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:59,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:59,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:59,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:59,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:55:59,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:59,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:55:59,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:59,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:59,852 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 97 treesize of output 111 [2022-03-03 19:56:00,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:00,503 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 72 [2022-03-03 19:56:00,544 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:00,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:56:00,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:00,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:00,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:01,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286984747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:01,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:01,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-03-03 19:56:01,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979229979] [2022-03-03 19:56:01,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:01,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:56:01,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:56:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:56:01,002 INFO L87 Difference]: Start difference. First operand 4813 states and 16581 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:09,364 INFO L93 Difference]: Finished difference Result 8556 states and 27077 transitions. [2022-03-03 19:56:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 19:56:09,364 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:09,381 INFO L225 Difference]: With dead ends: 8556 [2022-03-03 19:56:09,381 INFO L226 Difference]: Without dead ends: 8526 [2022-03-03 19:56:09,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1729, Invalid=14273, Unknown=0, NotChecked=0, Total=16002 [2022-03-03 19:56:09,382 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4108 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 4108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:09,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 843 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 4108 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-03 19:56:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2022-03-03 19:56:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 4824. [2022-03-03 19:56:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 3.4474393530997305) internal successors, (16627), 4823 states have internal predecessors, (16627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 16627 transitions. [2022-03-03 19:56:09,504 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 16627 transitions. Word has length 30 [2022-03-03 19:56:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:09,505 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 16627 transitions. [2022-03-03 19:56:09,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 16627 transitions. [2022-03-03 19:56:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:09,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:09,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:09,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:56:09,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 19:56:09,712 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 73995961, now seen corresponding path program 30 times [2022-03-03 19:56:09,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:09,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69141593] [2022-03-03 19:56:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:09,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:10,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69141593] [2022-03-03 19:56:10,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69141593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:10,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408510445] [2022-03-03 19:56:10,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:10,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:10,011 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) [2022-03-03 19:56:10,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:56:10,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:56:10,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,364 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-03-03 19:56:10,395 INFO L353 Elim1Store]: treesize reduction 47, result has 55.2 percent of original size [2022-03-03 19:56:10,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 78 [2022-03-03 19:56:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:10,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,404 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-03-03 19:56:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:10,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:56:10,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:56:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:10,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:10,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:56:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:11,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:11,850 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 72 [2022-03-03 19:56:11,893 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:11,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:56:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:11,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:11,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:11,913 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 65 treesize of output 81 [2022-03-03 19:56:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408510445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:12,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:12,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:56:12,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477596550] [2022-03-03 19:56:12,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:12,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:12,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:12,241 INFO L87 Difference]: Start difference. First operand 4824 states and 16627 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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) [2022-03-03 19:56:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:18,020 INFO L93 Difference]: Finished difference Result 9374 states and 29675 transitions. [2022-03-03 19:56:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:56:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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 30 [2022-03-03 19:56:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:18,039 INFO L225 Difference]: With dead ends: 9374 [2022-03-03 19:56:18,039 INFO L226 Difference]: Without dead ends: 9284 [2022-03-03 19:56:18,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4310 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1881, Invalid=10329, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:56:18,040 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 579 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 3087 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:18,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 544 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3087 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:56:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2022-03-03 19:56:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 4828. [2022-03-03 19:56:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 3.4481044126786826) internal successors, (16644), 4827 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 16644 transitions. [2022-03-03 19:56:18,179 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 16644 transitions. Word has length 30 [2022-03-03 19:56:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:18,179 INFO L470 AbstractCegarLoop]: Abstraction has 4828 states and 16644 transitions. [2022-03-03 19:56:18,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 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) [2022-03-03 19:56:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 16644 transitions. [2022-03-03 19:56:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:18,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:18,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:18,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:18,386 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,SelfDestructingSolverStorable69 [2022-03-03 19:56:18,387 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1141165369, now seen corresponding path program 31 times [2022-03-03 19:56:18,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:18,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395121356] [2022-03-03 19:56:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:18,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:18,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395121356] [2022-03-03 19:56:18,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395121356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:18,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304453693] [2022-03-03 19:56:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:56:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:18,684 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) [2022-03-03 19:56:18,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:56:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:56:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:19,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:19,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-03 19:56:19,091 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:19,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 35 [2022-03-03 19:56:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:19,094 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 16 [2022-03-03 19:56:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:19,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:19,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:56:19,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:56:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:19,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:19,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:21,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:21,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:21,320 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 72 [2022-03-03 19:56:21,361 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:21,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:56:21,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:21,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:21,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:21,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:56:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:21,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304453693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:21,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:21,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:56:21,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221076910] [2022-03-03 19:56:21,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:21,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:21,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:21,737 INFO L87 Difference]: Start difference. First operand 4828 states and 16644 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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) [2022-03-03 19:56:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:25,993 INFO L93 Difference]: Finished difference Result 8300 states and 26710 transitions. [2022-03-03 19:56:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:56:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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 30 [2022-03-03 19:56:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:26,010 INFO L225 Difference]: With dead ends: 8300 [2022-03-03 19:56:26,010 INFO L226 Difference]: Without dead ends: 8270 [2022-03-03 19:56:26,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1231, Invalid=6779, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:56:26,011 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 452 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:26,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 468 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:56:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8270 states. [2022-03-03 19:56:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8270 to 4813. [2022-03-03 19:56:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 3.4463840399002494) internal successors, (16584), 4812 states have internal predecessors, (16584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 16584 transitions. [2022-03-03 19:56:26,111 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 16584 transitions. Word has length 30 [2022-03-03 19:56:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:26,111 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 16584 transitions. [2022-03-03 19:56:26,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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) [2022-03-03 19:56:26,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 16584 transitions. [2022-03-03 19:56:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:26,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:26,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:26,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 19:56:26,318 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,SelfDestructingSolverStorable70 [2022-03-03 19:56:26,318 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash -769410283, now seen corresponding path program 32 times [2022-03-03 19:56:26,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:26,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268462213] [2022-03-03 19:56:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:26,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:26,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:26,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268462213] [2022-03-03 19:56:26,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268462213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:26,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951545329] [2022-03-03 19:56:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:56:26,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:26,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:26,612 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) [2022-03-03 19:56:26,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:56:26,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:56:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:26,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:26,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:26,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 35 [2022-03-03 19:56:26,999 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:26,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 30 [2022-03-03 19:56:27,002 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 16 [2022-03-03 19:56:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:27,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:27,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:56:27,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:56:27,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:27,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:27,341 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:56:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:29,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:56:29,801 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:29,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:56:29,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:29,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:29,821 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 65 treesize of output 81 [2022-03-03 19:56:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:30,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951545329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:30,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:30,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:56:30,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023227375] [2022-03-03 19:56:30,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:56:30,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:56:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:56:30,130 INFO L87 Difference]: Start difference. First operand 4813 states and 16584 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:56:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:34,320 INFO L93 Difference]: Finished difference Result 8554 states and 27486 transitions. [2022-03-03 19:56:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:56:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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 30 [2022-03-03 19:56:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:34,336 INFO L225 Difference]: With dead ends: 8554 [2022-03-03 19:56:34,336 INFO L226 Difference]: Without dead ends: 8503 [2022-03-03 19:56:34,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1274, Invalid=7656, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:56:34,337 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 514 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:34,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 365 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:56:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-03-03 19:56:34,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 4860. [2022-03-03 19:56:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 3.448857789668656) internal successors, (16758), 4859 states have internal predecessors, (16758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 16758 transitions. [2022-03-03 19:56:34,440 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 16758 transitions. Word has length 30 [2022-03-03 19:56:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:34,440 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 16758 transitions. [2022-03-03 19:56:34,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 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) [2022-03-03 19:56:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 16758 transitions. [2022-03-03 19:56:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:34,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:34,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:34,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:56:34,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:34,648 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1370560287, now seen corresponding path program 33 times [2022-03-03 19:56:34,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:34,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830097729] [2022-03-03 19:56:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:34,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:34,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830097729] [2022-03-03 19:56:34,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830097729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:34,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578058178] [2022-03-03 19:56:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:34,963 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) [2022-03-03 19:56:34,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:56:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:56:34,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:56:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:35,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2022-03-03 19:56:35,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:56:35,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:35,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-03-03 19:56:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:37,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:45,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:45,437 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 84 treesize of output 117 [2022-03-03 19:56:45,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:45,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-03 19:56:45,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:45,498 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 91 treesize of output 115 [2022-03-03 19:56:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:49,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578058178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:49,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:49,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-03 19:56:49,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080234443] [2022-03-03 19:56:49,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:49,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:56:49,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:49,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:56:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=890, Unknown=7, NotChecked=0, Total=1056 [2022-03-03 19:56:49,555 INFO L87 Difference]: Start difference. First operand 4860 states and 16758 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:56,603 INFO L93 Difference]: Finished difference Result 9120 states and 30249 transitions. [2022-03-03 19:56:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 19:56:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:56,622 INFO L225 Difference]: With dead ends: 9120 [2022-03-03 19:56:56,622 INFO L226 Difference]: Without dead ends: 9095 [2022-03-03 19:56:56,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1838, Invalid=7661, Unknown=7, NotChecked=0, Total=9506 [2022-03-03 19:56:56,623 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 776 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:56,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 422 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1819 Invalid, 0 Unknown, 776 Unchecked, 1.2s Time] [2022-03-03 19:56:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9095 states. [2022-03-03 19:56:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9095 to 4905. [2022-03-03 19:56:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.4494290375203915) internal successors, (16916), 4904 states have internal predecessors, (16916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 16916 transitions. [2022-03-03 19:56:56,729 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 16916 transitions. Word has length 30 [2022-03-03 19:56:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:56,729 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 16916 transitions. [2022-03-03 19:56:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 16916 transitions. [2022-03-03 19:56:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:56,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:56,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:56,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:56,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:56,938 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:56:56,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:56,939 INFO L85 PathProgramCache]: Analyzing trace with hash 402668975, now seen corresponding path program 34 times [2022-03-03 19:56:56,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:56,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816630796] [2022-03-03 19:56:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:57,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:57,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816630796] [2022-03-03 19:56:57,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816630796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:57,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281470410] [2022-03-03 19:56:57,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:57,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:57,246 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) [2022-03-03 19:56:57,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:56:57,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:56:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:57,576 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 50 treesize of output 42 [2022-03-03 19:56:57,590 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:56:57,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:56:57,593 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 25 treesize of output 21 [2022-03-03 19:56:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:57,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:57,930 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:56:57,930 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 46 treesize of output 81 [2022-03-03 19:56:57,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:57,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:56:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:57,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:57,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:56:58,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:58,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:58,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:58,550 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 72 [2022-03-03 19:56:58,592 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:56:58,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:56:58,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:58,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:58,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:58,614 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 65 treesize of output 81 [2022-03-03 19:56:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:58,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281470410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:58,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:58,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:56:58,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622291513] [2022-03-03 19:56:58,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:58,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:56:58,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:56:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:56:58,949 INFO L87 Difference]: Start difference. First operand 4905 states and 16916 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:57:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:03,348 INFO L93 Difference]: Finished difference Result 8809 states and 28697 transitions. [2022-03-03 19:57:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:57:03,348 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 30 [2022-03-03 19:57:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:03,366 INFO L225 Difference]: With dead ends: 8809 [2022-03-03 19:57:03,366 INFO L226 Difference]: Without dead ends: 8769 [2022-03-03 19:57:03,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1111, Invalid=7819, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:57:03,366 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 469 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:03,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 454 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:57:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8769 states. [2022-03-03 19:57:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8769 to 4890. [2022-03-03 19:57:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-03-03 19:57:03,471 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-03-03 19:57:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:03,471 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-03-03 19:57:03,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:57:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-03-03 19:57:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:03,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:03,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:03,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:03,679 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -3113723, now seen corresponding path program 35 times [2022-03-03 19:57:03,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:03,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048373211] [2022-03-03 19:57:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:04,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:04,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048373211] [2022-03-03 19:57:04,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048373211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:04,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874657156] [2022-03-03 19:57:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:04,014 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) [2022-03-03 19:57:04,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:57:04,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:57:04,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:57:04,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:04,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,312 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 43 treesize of output 43 [2022-03-03 19:57:04,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:57:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:04,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,332 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 67 treesize of output 63 [2022-03-03 19:57:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:04,788 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:04,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:57:04,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:57:04,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:04,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:04,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:57:05,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,570 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 72 [2022-03-03 19:57:05,612 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:05,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:57:05,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:05,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:05,640 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 65 treesize of output 81 [2022-03-03 19:57:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:06,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874657156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:06,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:06,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-03 19:57:06,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478869757] [2022-03-03 19:57:06,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:06,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:57:06,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:57:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:57:06,022 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:11,815 INFO L93 Difference]: Finished difference Result 10206 states and 32855 transitions. [2022-03-03 19:57:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:57:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:11,833 INFO L225 Difference]: With dead ends: 10206 [2022-03-03 19:57:11,834 INFO L226 Difference]: Without dead ends: 10088 [2022-03-03 19:57:11,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1509, Invalid=11601, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:57:11,834 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 534 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 4015 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 4015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:11,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 700 Invalid, 4223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 4015 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:57:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10088 states. [2022-03-03 19:57:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10088 to 4890. [2022-03-03 19:57:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4889 states have (on average 3.449580691347924) internal successors, (16865), 4889 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 16865 transitions. [2022-03-03 19:57:11,954 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 16865 transitions. Word has length 30 [2022-03-03 19:57:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:11,954 INFO L470 AbstractCegarLoop]: Abstraction has 4890 states and 16865 transitions. [2022-03-03 19:57:11,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 16865 transitions. [2022-03-03 19:57:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:11,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:11,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:11,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 19:57:12,162 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,SelfDestructingSolverStorable74 [2022-03-03 19:57:12,162 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:12,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:12,162 INFO L85 PathProgramCache]: Analyzing trace with hash 363581355, now seen corresponding path program 36 times [2022-03-03 19:57:12,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:12,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721011246] [2022-03-03 19:57:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:12,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:12,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721011246] [2022-03-03 19:57:12,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721011246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:12,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624906500] [2022-03-03 19:57:12,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:57:12,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:12,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:12,447 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) [2022-03-03 19:57:12,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:57:12,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:57:12,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:12,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:12,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:12,831 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 53 treesize of output 45 [2022-03-03 19:57:12,844 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:12,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 40 [2022-03-03 19:57:12,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:12,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2022-03-03 19:57:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:13,190 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:13,190 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 80 [2022-03-03 19:57:13,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:13,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:57:13,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:13,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:13,242 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 97 treesize of output 111 [2022-03-03 19:57:14,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:14,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:14,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:14,559 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 72 [2022-03-03 19:57:14,619 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:14,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:57:14,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:14,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:14,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:15,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624906500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:15,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:15,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-03 19:57:15,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869581074] [2022-03-03 19:57:15,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:15,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:15,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:15,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:15,161 INFO L87 Difference]: Start difference. First operand 4890 states and 16865 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:19,240 INFO L93 Difference]: Finished difference Result 8571 states and 27884 transitions. [2022-03-03 19:57:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:57:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:19,257 INFO L225 Difference]: With dead ends: 8571 [2022-03-03 19:57:19,257 INFO L226 Difference]: Without dead ends: 8537 [2022-03-03 19:57:19,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=917, Invalid=7455, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:57:19,258 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 384 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:19,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 448 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:57:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8537 states. [2022-03-03 19:57:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8537 to 5050. [2022-03-03 19:57:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5050 states, 5049 states have (on average 3.4476133887898595) internal successors, (17407), 5049 states have internal predecessors, (17407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5050 states to 5050 states and 17407 transitions. [2022-03-03 19:57:19,382 INFO L78 Accepts]: Start accepts. Automaton has 5050 states and 17407 transitions. Word has length 30 [2022-03-03 19:57:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:19,383 INFO L470 AbstractCegarLoop]: Abstraction has 5050 states and 17407 transitions. [2022-03-03 19:57:19,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5050 states and 17407 transitions. [2022-03-03 19:57:19,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:19,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:19,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:19,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:19,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:19,590 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -720955961, now seen corresponding path program 37 times [2022-03-03 19:57:19,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:19,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611047287] [2022-03-03 19:57:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:19,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:19,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:19,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611047287] [2022-03-03 19:57:19,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611047287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:19,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465023745] [2022-03-03 19:57:19,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:19,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:19,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:19,911 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) [2022-03-03 19:57:19,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:57:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:57:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:20,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,283 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 50 treesize of output 42 [2022-03-03 19:57:20,296 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:20,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:57:20,299 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 16 [2022-03-03 19:57:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,582 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 45 treesize of output 80 [2022-03-03 19:57:20,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:57:20,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:20,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:20,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:57:21,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:21,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:21,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:21,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:57:21,367 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:21,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:57:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:21,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:21,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:21,386 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 65 treesize of output 81 [2022-03-03 19:57:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:21,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465023745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:21,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:21,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:57:21,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113108508] [2022-03-03 19:57:21,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:21,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:21,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:21,801 INFO L87 Difference]: Start difference. First operand 5050 states and 17407 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:57:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:27,060 INFO L93 Difference]: Finished difference Result 9090 states and 29140 transitions. [2022-03-03 19:57:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:57:27,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 30 [2022-03-03 19:57:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:27,078 INFO L225 Difference]: With dead ends: 9090 [2022-03-03 19:57:27,079 INFO L226 Difference]: Without dead ends: 9033 [2022-03-03 19:57:27,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1717, Invalid=10493, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:57:27,080 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 488 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:27,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 399 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:57:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9033 states. [2022-03-03 19:57:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9033 to 5132. [2022-03-03 19:57:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 3.4433833560709415) internal successors, (17668), 5131 states have internal predecessors, (17668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 17668 transitions. [2022-03-03 19:57:27,187 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 17668 transitions. Word has length 30 [2022-03-03 19:57:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:27,187 INFO L470 AbstractCegarLoop]: Abstraction has 5132 states and 17668 transitions. [2022-03-03 19:57:27,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:57:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 17668 transitions. [2022-03-03 19:57:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:27,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:27,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:27,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:57:27,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:27,395 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:27,395 INFO L85 PathProgramCache]: Analyzing trace with hash 768780149, now seen corresponding path program 38 times [2022-03-03 19:57:27,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:27,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40557336] [2022-03-03 19:57:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:27,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:27,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:27,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40557336] [2022-03-03 19:57:27,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40557336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:27,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733034491] [2022-03-03 19:57:27,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:27,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:27,669 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) [2022-03-03 19:57:27,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:57:27,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:27,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:28,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,004 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 52 treesize of output 52 [2022-03-03 19:57:28,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 68 [2022-03-03 19:57:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:28,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,026 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 71 treesize of output 65 [2022-03-03 19:57:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:28,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:28,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,413 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:57:28,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:57:28,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:28,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:28,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:57:29,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:29,259 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 72 [2022-03-03 19:57:29,302 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:29,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:57:29,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:29,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:29,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:57:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:29,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733034491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:29,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:29,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:57:29,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014088416] [2022-03-03 19:57:29,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:29,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:57:29,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:57:29,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:57:29,732 INFO L87 Difference]: Start difference. First operand 5132 states and 17668 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:57:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:36,774 INFO L93 Difference]: Finished difference Result 10200 states and 32429 transitions. [2022-03-03 19:57:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-03 19:57:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 30 [2022-03-03 19:57:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:36,795 INFO L225 Difference]: With dead ends: 10200 [2022-03-03 19:57:36,795 INFO L226 Difference]: Without dead ends: 10080 [2022-03-03 19:57:36,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2582, Invalid=16324, Unknown=0, NotChecked=0, Total=18906 [2022-03-03 19:57:36,797 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 574 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:36,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 554 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:57:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10080 states. [2022-03-03 19:57:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10080 to 5115. [2022-03-03 19:57:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 5114 states have (on average 3.4419241298396557) internal successors, (17602), 5114 states have internal predecessors, (17602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 17602 transitions. [2022-03-03 19:57:36,936 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 17602 transitions. Word has length 30 [2022-03-03 19:57:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:36,937 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 17602 transitions. [2022-03-03 19:57:36,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:57:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 17602 transitions. [2022-03-03 19:57:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:36,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:36,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:36,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:57:37,145 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,SelfDestructingSolverStorable77 [2022-03-03 19:57:37,145 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1129877915, now seen corresponding path program 39 times [2022-03-03 19:57:37,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:37,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937712535] [2022-03-03 19:57:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:37,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:37,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:37,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937712535] [2022-03-03 19:57:37,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937712535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:37,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51552569] [2022-03-03 19:57:37,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:37,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:37,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:37,488 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) [2022-03-03 19:57:37,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:57:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:57:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:37,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:37,762 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 48 treesize of output 56 [2022-03-03 19:57:37,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:37,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 64 [2022-03-03 19:57:37,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:37,797 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 67 treesize of output 71 [2022-03-03 19:57:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:38,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:38,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:38,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:38,557 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 46 treesize of output 73 [2022-03-03 19:57:38,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:38,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:57:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:38,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:38,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:38,610 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 97 treesize of output 103 [2022-03-03 19:57:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:39,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 35 [2022-03-03 19:57:39,055 INFO L353 Elim1Store]: treesize reduction 67, result has 26.4 percent of original size [2022-03-03 19:57:39,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 33 [2022-03-03 19:57:39,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:39,059 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 15 treesize of output 11 [2022-03-03 19:57:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:39,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51552569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:39,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:39,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-03 19:57:39,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964904742] [2022-03-03 19:57:39,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:39,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:57:39,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:57:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:57:39,224 INFO L87 Difference]: Start difference. First operand 5115 states and 17602 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:44,366 INFO L93 Difference]: Finished difference Result 9935 states and 32181 transitions. [2022-03-03 19:57:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:57:44,366 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:44,387 INFO L225 Difference]: With dead ends: 9935 [2022-03-03 19:57:44,387 INFO L226 Difference]: Without dead ends: 9758 [2022-03-03 19:57:44,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1813, Invalid=9317, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:57:44,388 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 817 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:44,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 459 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:57:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2022-03-03 19:57:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 5189. [2022-03-03 19:57:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 3.4335003855050115) internal successors, (17813), 5188 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 17813 transitions. [2022-03-03 19:57:44,552 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 17813 transitions. Word has length 30 [2022-03-03 19:57:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 5189 states and 17813 transitions. [2022-03-03 19:57:44,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 17813 transitions. [2022-03-03 19:57:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:44,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:44,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:44,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:44,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 19:57:44,761 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 36149297, now seen corresponding path program 40 times [2022-03-03 19:57:44,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:44,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007215611] [2022-03-03 19:57:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:44,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:45,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:45,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007215611] [2022-03-03 19:57:45,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007215611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:45,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112618437] [2022-03-03 19:57:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:57:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:45,077 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) [2022-03-03 19:57:45,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:57:45,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:57:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:57:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:45,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:45,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:45,398 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 45 treesize of output 37 [2022-03-03 19:57:45,411 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:45,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select 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 32 [2022-03-03 19:57:45,414 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 21 [2022-03-03 19:57:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:45,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:45,741 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:45,741 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 46 treesize of output 81 [2022-03-03 19:57:45,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:45,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:57:45,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:45,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:45,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:57:47,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:47,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 72 [2022-03-03 19:57:47,771 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:57:47,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:57:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:47,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:47,794 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 65 treesize of output 81 [2022-03-03 19:57:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:48,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112618437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:48,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:48,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:57:48,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743877198] [2022-03-03 19:57:48,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:48,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:57:48,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:48,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:57:48,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:57:48,313 INFO L87 Difference]: Start difference. First operand 5189 states and 17813 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:57:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:54,657 INFO L93 Difference]: Finished difference Result 9589 states and 30938 transitions. [2022-03-03 19:57:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:57:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 30 [2022-03-03 19:57:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:54,675 INFO L225 Difference]: With dead ends: 9589 [2022-03-03 19:57:54,676 INFO L226 Difference]: Without dead ends: 9535 [2022-03-03 19:57:54,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4215 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1485, Invalid=11397, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 19:57:54,677 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 500 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 3388 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:54,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 495 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3388 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:57:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2022-03-03 19:57:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 5243. [2022-03-03 19:57:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.4296070202212894) internal successors, (17978), 5242 states have internal predecessors, (17978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 17978 transitions. [2022-03-03 19:57:54,795 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 17978 transitions. Word has length 30 [2022-03-03 19:57:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:54,795 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 17978 transitions. [2022-03-03 19:57:54,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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) [2022-03-03 19:57:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 17978 transitions. [2022-03-03 19:57:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:54,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:54,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:54,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-03 19:57:55,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:55,003 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:57:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash 933428853, now seen corresponding path program 41 times [2022-03-03 19:57:55,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:55,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383419780] [2022-03-03 19:57:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:55,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:55,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383419780] [2022-03-03 19:57:55,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383419780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:55,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120522047] [2022-03-03 19:57:55,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:57:55,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:55,318 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) [2022-03-03 19:57:55,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:57:55,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:57:55,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:57:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:58,971 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 50 treesize of output 42 [2022-03-03 19:57:58,984 INFO L353 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-03-03 19:57:58,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2022-03-03 19:57:58,987 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 21 [2022-03-03 19:57:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:59,317 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:57:59,317 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 80 [2022-03-03 19:57:59,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:59,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:57:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:59,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:57:59,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:58:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:00,269 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 46 treesize of output 73 [2022-03-03 19:58:00,311 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:58:00,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 75 [2022-03-03 19:58:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:00,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:00,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:58:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:00,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120522047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:00,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:00,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-03 19:58:00,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233372311] [2022-03-03 19:58:00,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:58:00,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:58:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=921, Unknown=3, NotChecked=0, Total=1056 [2022-03-03 19:58:00,743 INFO L87 Difference]: Start difference. First operand 5243 states and 17978 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:58:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:07,909 INFO L93 Difference]: Finished difference Result 9413 states and 30541 transitions. [2022-03-03 19:58:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:58:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-03 19:58:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:07,929 INFO L225 Difference]: With dead ends: 9413 [2022-03-03 19:58:07,929 INFO L226 Difference]: Without dead ends: 9344 [2022-03-03 19:58:07,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1303, Invalid=9200, Unknown=3, NotChecked=0, Total=10506 [2022-03-03 19:58:07,930 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 423 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:07,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 477 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2484 Invalid, 0 Unknown, 289 Unchecked, 1.3s Time] [2022-03-03 19:58:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-03-03 19:58:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 5305. [2022-03-03 19:58:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5305 states, 5304 states have (on average 3.427413273001508) internal successors, (18179), 5304 states have internal predecessors, (18179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5305 states to 5305 states and 18179 transitions. [2022-03-03 19:58:08,051 INFO L78 Accepts]: Start accepts. Automaton has 5305 states and 18179 transitions. Word has length 30 [2022-03-03 19:58:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:08,051 INFO L470 AbstractCegarLoop]: Abstraction has 5305 states and 18179 transitions. [2022-03-03 19:58:08,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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) [2022-03-03 19:58:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5305 states and 18179 transitions. [2022-03-03 19:58:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:08,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:08,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:08,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:08,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:08,260 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1657395211, now seen corresponding path program 42 times [2022-03-03 19:58:08,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:08,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971459124] [2022-03-03 19:58:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:08,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971459124] [2022-03-03 19:58:08,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971459124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:08,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953804118] [2022-03-03 19:58:08,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:08,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:08,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:08,546 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) [2022-03-03 19:58:08,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:58:08,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:58:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:58:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:08,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:08,865 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-03-03 19:58:08,895 INFO L353 Elim1Store]: treesize reduction 41, result has 55.9 percent of original size [2022-03-03 19:58:08,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 66 [2022-03-03 19:58:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:08,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:08,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:58:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:09,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:09,336 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:58:09,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 81 [2022-03-03 19:58:09,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:09,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 107 [2022-03-03 19:58:09,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:09,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:09,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 97 treesize of output 111 [2022-03-03 19:58:10,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:10,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:10,887 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 72 [2022-03-03 19:58:10,929 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:58:10,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:58:10,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:10,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:10,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:10,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:58:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:11,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953804118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:11,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:11,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-03 19:58:11,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867057893] [2022-03-03 19:58:11,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:11,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:58:11,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:58:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:58:11,290 INFO L87 Difference]: Start difference. First operand 5305 states and 18179 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:14,322 INFO L93 Difference]: Finished difference Result 9104 states and 29726 transitions. [2022-03-03 19:58:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:58:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:58:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:14,339 INFO L225 Difference]: With dead ends: 9104 [2022-03-03 19:58:14,340 INFO L226 Difference]: Without dead ends: 9045 [2022-03-03 19:58:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=841, Invalid=5321, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:58:14,340 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 470 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:14,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 443 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:58:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2022-03-03 19:58:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 5313. [2022-03-03 19:58:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 3.426769578313253) internal successors, (18203), 5312 states have internal predecessors, (18203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 18203 transitions. [2022-03-03 19:58:14,446 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 18203 transitions. Word has length 30 [2022-03-03 19:58:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:14,446 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 18203 transitions. [2022-03-03 19:58:14,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 18203 transitions. [2022-03-03 19:58:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:14,454 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:14,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:14,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 19:58:14,654 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,SelfDestructingSolverStorable81 [2022-03-03 19:58:14,654 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash 987303649, now seen corresponding path program 43 times [2022-03-03 19:58:14,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:14,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860198094] [2022-03-03 19:58:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:14,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:14,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860198094] [2022-03-03 19:58:14,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860198094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:14,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053171167] [2022-03-03 19:58:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:14,936 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) [2022-03-03 19:58:14,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:58:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:58:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:17,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:17,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:17,701 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 50 treesize of output 50 [2022-03-03 19:58:17,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 66 [2022-03-03 19:58:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:17,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:17,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2022-03-03 19:58:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:18,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 80 [2022-03-03 19:58:18,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:58:18,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 111 [2022-03-03 19:58:18,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,913 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 46 treesize of output 73 [2022-03-03 19:58:18,955 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:58:18,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 75 [2022-03-03 19:58:18,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:18,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:18,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 81 [2022-03-03 19:58:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:19,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053171167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:19,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:19,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:58:19,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830607663] [2022-03-03 19:58:19,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:19,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:19,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=737, Unknown=2, NotChecked=0, Total=870 [2022-03-03 19:58:19,356 INFO L87 Difference]: Start difference. First operand 5313 states and 18203 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:58:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:28,278 INFO L93 Difference]: Finished difference Result 9470 states and 30254 transitions. [2022-03-03 19:58:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:58:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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 30 [2022-03-03 19:58:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:28,295 INFO L225 Difference]: With dead ends: 9470 [2022-03-03 19:58:28,295 INFO L226 Difference]: Without dead ends: 9326 [2022-03-03 19:58:28,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2625 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1276, Invalid=6732, Unknown=2, NotChecked=0, Total=8010 [2022-03-03 19:58:28,296 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 436 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:28,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 403 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2033 Invalid, 0 Unknown, 159 Unchecked, 1.0s Time] [2022-03-03 19:58:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9326 states. [2022-03-03 19:58:28,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9326 to 5342. [2022-03-03 19:58:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 3.4263246583036886) internal successors, (18300), 5341 states have internal predecessors, (18300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 18300 transitions. [2022-03-03 19:58:28,435 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 18300 transitions. Word has length 30 [2022-03-03 19:58:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:28,435 INFO L470 AbstractCegarLoop]: Abstraction has 5342 states and 18300 transitions. [2022-03-03 19:58:28,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 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) [2022-03-03 19:58:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 18300 transitions. [2022-03-03 19:58:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:28,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:28,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:28,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:28,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:28,643 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1044008881, now seen corresponding path program 44 times [2022-03-03 19:58:28,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:28,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263679613] [2022-03-03 19:58:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:28,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:28,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263679613] [2022-03-03 19:58:28,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263679613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:28,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672851386] [2022-03-03 19:58:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:28,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:28,952 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) [2022-03-03 19:58:28,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:58:28,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:28,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:58:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:31,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:31,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-03-03 19:58:31,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:31,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:58:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:31,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:31,620 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 67 treesize of output 63 [2022-03-03 19:58:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:31,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:31,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:31,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:31,984 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 80 [2022-03-03 19:58:32,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:32,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 106 [2022-03-03 19:58:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:32,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:32,039 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 97 treesize of output 111 [2022-03-03 19:58:33,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:33,384 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 72 [2022-03-03 19:58:33,426 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-03 19:58:33,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 74 [2022-03-03 19:58:33,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:33,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:33,447 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 65 treesize of output 81 [2022-03-03 19:58:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:33,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672851386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:33,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:33,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 30 [2022-03-03 19:58:33,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772641284] [2022-03-03 19:58:33,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:33,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:33,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=738, Unknown=2, NotChecked=0, Total=870 [2022-03-03 19:58:33,823 INFO L87 Difference]: Start difference. First operand 5342 states and 18300 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:58:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:37,816 INFO L93 Difference]: Finished difference Result 9904 states and 31520 transitions. [2022-03-03 19:58:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:58:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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 30 [2022-03-03 19:58:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:37,837 INFO L225 Difference]: With dead ends: 9904 [2022-03-03 19:58:37,837 INFO L226 Difference]: Without dead ends: 9760 [2022-03-03 19:58:37,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1340, Invalid=7588, Unknown=2, NotChecked=0, Total=8930 [2022-03-03 19:58:37,838 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 492 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 614 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:37,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 483 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2132 Invalid, 0 Unknown, 614 Unchecked, 1.1s Time] [2022-03-03 19:58:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2022-03-03 19:58:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 5339. [2022-03-03 19:58:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5338 states have (on average 3.4263769201948295) internal successors, (18290), 5338 states have internal predecessors, (18290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 18290 transitions. [2022-03-03 19:58:38,003 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 18290 transitions. Word has length 30 [2022-03-03 19:58:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:38,003 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 18290 transitions. [2022-03-03 19:58:38,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 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) [2022-03-03 19:58:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 18290 transitions. [2022-03-03 19:58:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:58:38,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:38,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:38,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:38,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,212 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:58:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1597669409, now seen corresponding path program 45 times [2022-03-03 19:58:38,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:38,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538030438] [2022-03-03 19:58:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:38,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:38,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538030438] [2022-03-03 19:58:38,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538030438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:38,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776662149] [2022-03-03 19:58:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:38,511 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) [2022-03-03 19:58:38,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:58:38,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:58:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:58:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:38,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:38,821 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 51 [2022-03-03 19:58:38,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:38,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 59 [2022-03-03 19:58:38,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:38,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:38,848 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 67 treesize of output 71 [2022-03-03 19:58:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:39,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:39,391 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 84 treesize of output 117 [2022-03-03 19:58:39,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:39,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 111 [2022-03-03 19:58:39,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:39,450 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 91 treesize of output 115 [2022-03-03 19:58:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:45,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776662149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:45,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:45,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:58:45,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633525435] [2022-03-03 19:58:45,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:45,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:45,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:45,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:45,664 INFO L87 Difference]: Start difference. First operand 5339 states and 18290 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 30 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) [2022-03-03 19:59:09,904 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-03 19:59:09,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-03-03 19:59:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:59:09,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=657, Invalid=2765, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:59:09,907 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:59:09,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 41 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 560 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-03-03 19:59:09,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 19:59:10,107 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,SelfDestructingSolverStorable84 [2022-03-03 19:59:10,108 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:193) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-03-03 19:59:10,114 INFO L158 Benchmark]: Toolchain (without parser) took 766960.67ms. Allocated memory was 188.7MB in the beginning and 702.5MB in the end (delta: 513.8MB). Free memory was 153.3MB in the beginning and 322.0MB in the end (delta: -168.7MB). Peak memory consumption was 345.9MB. Max. memory is 8.0GB. [2022-03-03 19:59:10,115 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:59:10,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.91ms. Allocated memory is still 188.7MB. Free memory was 153.3MB in the beginning and 151.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:59:10,115 INFO L158 Benchmark]: Boogie Preprocessor took 17.41ms. Allocated memory is still 188.7MB. Free memory was 151.8MB in the beginning and 150.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:59:10,115 INFO L158 Benchmark]: RCFGBuilder took 214.55ms. Allocated memory is still 188.7MB. Free memory was 150.7MB in the beginning and 141.7MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 19:59:10,115 INFO L158 Benchmark]: TraceAbstraction took 766706.57ms. Allocated memory was 188.7MB in the beginning and 702.5MB in the end (delta: 513.8MB). Free memory was 141.3MB in the beginning and 322.0MB in the end (delta: -180.7MB). Peak memory consumption was 334.4MB. Max. memory is 8.0GB. [2022-03-03 19:59:10,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 188.7MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.91ms. Allocated memory is still 188.7MB. Free memory was 153.3MB in the beginning and 151.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.41ms. Allocated memory is still 188.7MB. Free memory was 151.8MB in the beginning and 150.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 214.55ms. Allocated memory is still 188.7MB. Free memory was 150.7MB in the beginning and 141.7MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 766706.57ms. Allocated memory was 188.7MB in the beginning and 702.5MB in the end (delta: 513.8MB). Free memory was 141.3MB in the beginning and 322.0MB in the end (delta: -180.7MB). Peak memory consumption was 334.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...