/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons-eq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:05:57,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:05:57,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:05:57,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:05:57,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:05:57,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:05:57,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:05:57,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:05:57,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:05:57,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:05:57,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:05:57,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 20:05:57,255 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-Delay.epf [2021-08-06 20:05:57,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:05:57,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:05:57,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:05:57,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:05:57,281 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:05:57,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:05:57,281 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:05:57,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:05:57,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:05:57,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:05:57,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:05:57,284 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:05:57,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:05:57,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:05:57,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:05:57,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:05:57,564 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:05:57,569 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:05:57,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons-eq.wvr.bpl [2021-08-06 20:05:57,581 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons-eq.wvr.bpl' [2021-08-06 20:05:57,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:05:57,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:05:57,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:05:57,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:05:57,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:05:57,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:05:57,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:05:57,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:05:57,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:05:57,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:05:57,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:05:57,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:05:57,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:05:57,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/1) ... [2021-08-06 20:05:57,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:05:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:57,750 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) [2021-08-06 20:05:57,766 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 [2021-08-06 20:05:57,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:05:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:05:57,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:05:57,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:05:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:05:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:05:57,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:05:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:05:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:05:57,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:05:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:05:57,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:05:57,779 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:05:57,916 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:05:57,916 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:05:57,917 INFO L202 PluginConnector]: Adding new model prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:05:57 BoogieIcfgContainer [2021-08-06 20:05:57,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:05:57,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:05:57,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:05:57,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:05:57,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:05:57" (1/2) ... [2021-08-06 20:05:57,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6a10c6 and model type prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:05:57, skipping insertion in model container [2021-08-06 20:05:57,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:05:57" (2/2) ... [2021-08-06 20:05:57,940 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons-eq.wvr.bpl [2021-08-06 20:05:57,943 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:05:57,943 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:05:57,943 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:05:57,943 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:05:57,969 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:05:57,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:05:58,012 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:05:58,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:05:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 209 states, 158 states have (on average 1.7025316455696202) internal successors, (269), 208 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 20:05:58,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:58,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:58,130 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash -219169868, now seen corresponding path program 1 times [2021-08-06 20:05:58,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:58,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621812108] [2021-08-06 20:05:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:58,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:58,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621812108] [2021-08-06 20:05:58,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621812108] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:05:58,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:05:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:05:58,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832115377] [2021-08-06 20:05:58,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:05:58,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:05:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:05:58,238 INFO L87 Difference]: Start difference. First operand has 209 states, 158 states have (on average 1.7025316455696202) internal successors, (269), 208 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:58,262 INFO L93 Difference]: Finished difference Result 224 states and 286 transitions. [2021-08-06 20:05:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:05:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 20:05:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:58,269 INFO L225 Difference]: With dead ends: 224 [2021-08-06 20:05:58,270 INFO L226 Difference]: Without dead ends: 108 [2021-08-06 20:05:58,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:05:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-06 20:05:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-06 20:05:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.485981308411215) internal successors, (159), 107 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 159 transitions. [2021-08-06 20:05:58,296 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 159 transitions. Word has length 15 [2021-08-06 20:05:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:58,296 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 159 transitions. [2021-08-06 20:05:58,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 159 transitions. [2021-08-06 20:05:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:05:58,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:58,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:58,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:05:58,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1325602641, now seen corresponding path program 1 times [2021-08-06 20:05:58,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:58,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296070128] [2021-08-06 20:05:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:05:58,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:58,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296070128] [2021-08-06 20:05:58,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296070128] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:05:58,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:05:58,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:05:58,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753262577] [2021-08-06 20:05:58,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:05:58,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:05:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:05:58,327 INFO L87 Difference]: Start difference. First operand 108 states and 159 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:58,335 INFO L93 Difference]: Finished difference Result 129 states and 217 transitions. [2021-08-06 20:05:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:05:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:05:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:58,336 INFO L225 Difference]: With dead ends: 129 [2021-08-06 20:05:58,336 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:05:58,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:05:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:05:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-08-06 20:05:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.6953125) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 217 transitions. [2021-08-06 20:05:58,344 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 217 transitions. Word has length 19 [2021-08-06 20:05:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:58,345 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 217 transitions. [2021-08-06 20:05:58,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 217 transitions. [2021-08-06 20:05:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:05:58,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:58,346 INFO L512 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] [2021-08-06 20:05:58,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:05:58,346 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1602204114, now seen corresponding path program 1 times [2021-08-06 20:05:58,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:58,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546032133] [2021-08-06 20:05:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:58,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:58,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546032133] [2021-08-06 20:05:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546032133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:05:58,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:05:58,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:05:58,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354553413] [2021-08-06 20:05:58,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:05:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:05:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:05:58,391 INFO L87 Difference]: Start difference. First operand 129 states and 217 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:58,409 INFO L93 Difference]: Finished difference Result 225 states and 376 transitions. [2021-08-06 20:05:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:05:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 20:05:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:58,411 INFO L225 Difference]: With dead ends: 225 [2021-08-06 20:05:58,411 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 20:05:58,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:05:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 20:05:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 152. [2021-08-06 20:05:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 151 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 260 transitions. [2021-08-06 20:05:58,421 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 260 transitions. Word has length 23 [2021-08-06 20:05:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:58,422 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 260 transitions. [2021-08-06 20:05:58,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 260 transitions. [2021-08-06 20:05:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:58,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:58,423 INFO L512 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] [2021-08-06 20:05:58,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:05:58,423 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:58,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1041441006, now seen corresponding path program 1 times [2021-08-06 20:05:58,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:58,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933210214] [2021-08-06 20:05:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:58,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:58,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933210214] [2021-08-06 20:05:58,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933210214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:58,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465141698] [2021-08-06 20:05:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:58,626 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) [2021-08-06 20:05:58,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:05:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 20:05:58,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:58,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 20:05:59,000 INFO L388 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 19 treesize of output 7 [2021-08-06 20:05:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:59,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465141698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:59,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:59,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:05:59,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223352338] [2021-08-06 20:05:59,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:05:59,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:05:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:05:59,067 INFO L87 Difference]: Start difference. First operand 152 states and 260 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:59,149 INFO L93 Difference]: Finished difference Result 293 states and 503 transitions. [2021-08-06 20:05:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:05:59,150 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:05:59,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:59,156 INFO L225 Difference]: With dead ends: 293 [2021-08-06 20:05:59,156 INFO L226 Difference]: Without dead ends: 288 [2021-08-06 20:05:59,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:05:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-06 20:05:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 220. [2021-08-06 20:05:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.7853881278538812) internal successors, (391), 219 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 391 transitions. [2021-08-06 20:05:59,176 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 391 transitions. Word has length 25 [2021-08-06 20:05:59,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:59,177 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 391 transitions. [2021-08-06 20:05:59,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 391 transitions. [2021-08-06 20:05:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:59,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:59,182 INFO L512 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] [2021-08-06 20:05:59,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 20:05:59,400 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 [2021-08-06 20:05:59,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:59,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1177818002, now seen corresponding path program 2 times [2021-08-06 20:05:59,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:59,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933156351] [2021-08-06 20:05:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:59,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:59,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:59,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933156351] [2021-08-06 20:05:59,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933156351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:59,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220234527] [2021-08-06 20:05:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:05:59,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:59,483 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) [2021-08-06 20:05:59,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:05:59,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:05:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 20:05:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:59,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 20:05:59,673 INFO L388 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 19 treesize of output 7 [2021-08-06 20:05:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220234527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:59,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:05:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805118754] [2021-08-06 20:05:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:05:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:05:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:05:59,721 INFO L87 Difference]: Start difference. First operand 220 states and 391 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:59,762 INFO L93 Difference]: Finished difference Result 390 states and 666 transitions. [2021-08-06 20:05:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:05:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:05:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:59,764 INFO L225 Difference]: With dead ends: 390 [2021-08-06 20:05:59,764 INFO L226 Difference]: Without dead ends: 385 [2021-08-06 20:05:59,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:05:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-08-06 20:05:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 275. [2021-08-06 20:05:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.7262773722627738) internal successors, (473), 274 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 473 transitions. [2021-08-06 20:05:59,774 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 473 transitions. Word has length 25 [2021-08-06 20:05:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:59,774 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 473 transitions. [2021-08-06 20:05:59,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 473 transitions. [2021-08-06 20:05:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 20:05:59,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:59,775 INFO L512 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] [2021-08-06 20:05:59,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:05:59,992 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 [2021-08-06 20:05:59,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:05:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1902142766, now seen corresponding path program 3 times [2021-08-06 20:05:59,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:59,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871128526] [2021-08-06 20:05:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:59,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:00,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871128526] [2021-08-06 20:06:00,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871128526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839471481] [2021-08-06 20:06:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:00,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:00,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:00,076 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) [2021-08-06 20:06:00,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:06:00,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:00,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:06:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:00,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 20:06:00,288 INFO L388 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 23 treesize of output 7 [2021-08-06 20:06:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:00,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839471481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:00,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:00,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 20:06:00,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969602177] [2021-08-06 20:06:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 20:06:00,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 20:06:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:06:00,324 INFO L87 Difference]: Start difference. First operand 275 states and 473 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:00,365 INFO L93 Difference]: Finished difference Result 369 states and 636 transitions. [2021-08-06 20:06:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 20:06:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 20:06:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:00,367 INFO L225 Difference]: With dead ends: 369 [2021-08-06 20:06:00,367 INFO L226 Difference]: Without dead ends: 364 [2021-08-06 20:06:00,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:06:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-06 20:06:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 291. [2021-08-06 20:06:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.706896551724138) internal successors, (495), 290 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 495 transitions. [2021-08-06 20:06:00,374 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 495 transitions. Word has length 25 [2021-08-06 20:06:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:00,375 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 495 transitions. [2021-08-06 20:06:00,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 495 transitions. [2021-08-06 20:06:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:06:00,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:00,376 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:00,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:00,590 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 [2021-08-06 20:06:00,590 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash 889796172, now seen corresponding path program 4 times [2021-08-06 20:06:00,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:00,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678282364] [2021-08-06 20:06:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:00,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:00,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:00,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678282364] [2021-08-06 20:06:00,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678282364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:00,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295408252] [2021-08-06 20:06:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:00,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:00,630 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) [2021-08-06 20:06:00,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:06:00,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:06:00,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:00,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:00,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:06:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:00,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295408252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:00,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:00,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 5 [2021-08-06 20:06:00,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741995914] [2021-08-06 20:06:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:06:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:06:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:06:00,805 INFO L87 Difference]: Start difference. First operand 291 states and 495 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:00,828 INFO L93 Difference]: Finished difference Result 491 states and 854 transitions. [2021-08-06 20:06:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:06:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:06:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:00,830 INFO L225 Difference]: With dead ends: 491 [2021-08-06 20:06:00,830 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 20:06:00,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:06:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 20:06:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 471. [2021-08-06 20:06:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.751063829787234) internal successors, (823), 470 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 823 transitions. [2021-08-06 20:06:00,839 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 823 transitions. Word has length 27 [2021-08-06 20:06:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:00,839 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 823 transitions. [2021-08-06 20:06:00,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 823 transitions. [2021-08-06 20:06:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:00,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:00,840 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:00,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:01,057 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 [2021-08-06 20:06:01,057 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -116326901, now seen corresponding path program 5 times [2021-08-06 20:06:01,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:01,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060740662] [2021-08-06 20:06:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:01,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:01,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:01,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060740662] [2021-08-06 20:06:01,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060740662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:01,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114441055] [2021-08-06 20:06:01,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:01,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:01,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:01,128 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) [2021-08-06 20:06:01,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:06:01,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:01,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:01,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:01,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:01,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114441055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:01,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:06:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545057896] [2021-08-06 20:06:01,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:01,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:01,445 INFO L87 Difference]: Start difference. First operand 471 states and 823 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:01,849 INFO L93 Difference]: Finished difference Result 1155 states and 1962 transitions. [2021-08-06 20:06:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:06:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:01,852 INFO L225 Difference]: With dead ends: 1155 [2021-08-06 20:06:01,852 INFO L226 Difference]: Without dead ends: 1089 [2021-08-06 20:06:01,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:06:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-06 20:06:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 747. [2021-08-06 20:06:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 1.8203753351206435) internal successors, (1358), 746 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1358 transitions. [2021-08-06 20:06:01,867 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1358 transitions. Word has length 29 [2021-08-06 20:06:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:01,867 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1358 transitions. [2021-08-06 20:06:01,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1358 transitions. [2021-08-06 20:06:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:01,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:01,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:01,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:02,085 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 [2021-08-06 20:06:02,086 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash -555565621, now seen corresponding path program 6 times [2021-08-06 20:06:02,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:02,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050379742] [2021-08-06 20:06:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:02,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:02,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:02,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050379742] [2021-08-06 20:06:02,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050379742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:02,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549878476] [2021-08-06 20:06:02,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:02,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:02,138 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) [2021-08-06 20:06:02,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:06:02,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 20:06:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:02,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:02,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:02,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:06:02,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:06:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:02,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549878476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:02,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:02,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:06:02,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774715662] [2021-08-06 20:06:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:02,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:02,493 INFO L87 Difference]: Start difference. First operand 747 states and 1358 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:03,096 INFO L93 Difference]: Finished difference Result 1166 states and 2067 transitions. [2021-08-06 20:06:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:06:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:03,100 INFO L225 Difference]: With dead ends: 1166 [2021-08-06 20:06:03,100 INFO L226 Difference]: Without dead ends: 1133 [2021-08-06 20:06:03,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:06:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-08-06 20:06:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 726. [2021-08-06 20:06:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.8289655172413792) internal successors, (1326), 725 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1326 transitions. [2021-08-06 20:06:03,114 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1326 transitions. Word has length 29 [2021-08-06 20:06:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:03,114 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1326 transitions. [2021-08-06 20:06:03,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1326 transitions. [2021-08-06 20:06:03,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:03,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:03,116 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:03,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:03,333 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 [2021-08-06 20:06:03,333 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash 38706571, now seen corresponding path program 7 times [2021-08-06 20:06:03,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:03,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284018589] [2021-08-06 20:06:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:03,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:03,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:03,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284018589] [2021-08-06 20:06:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284018589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:03,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648215028] [2021-08-06 20:06:03,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:03,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:03,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:03,378 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) [2021-08-06 20:06:03,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:06:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:03,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:06:03,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 20:06:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:06:03,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:06:03,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:06:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:03,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648215028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:03,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:03,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 20:06:03,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866486364] [2021-08-06 20:06:03,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:06:03,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:06:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:06:03,659 INFO L87 Difference]: Start difference. First operand 726 states and 1326 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:03,814 INFO L93 Difference]: Finished difference Result 1118 states and 1926 transitions. [2021-08-06 20:06:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:06:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:03,818 INFO L225 Difference]: With dead ends: 1118 [2021-08-06 20:06:03,818 INFO L226 Difference]: Without dead ends: 1097 [2021-08-06 20:06:03,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:06:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-08-06 20:06:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 735. [2021-08-06 20:06:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.818801089918256) internal successors, (1335), 734 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1335 transitions. [2021-08-06 20:06:03,830 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1335 transitions. Word has length 29 [2021-08-06 20:06:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1335 transitions. [2021-08-06 20:06:03,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1335 transitions. [2021-08-06 20:06:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:03,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:03,832 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:03,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:04,048 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 [2021-08-06 20:06:04,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:04,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:04,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1958175307, now seen corresponding path program 8 times [2021-08-06 20:06:04,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:04,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058409742] [2021-08-06 20:06:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:04,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:04,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:04,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058409742] [2021-08-06 20:06:04,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058409742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:04,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224995970] [2021-08-06 20:06:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:04,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:04,105 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) [2021-08-06 20:06:04,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:06:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:04,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 45.0 percent of original size [2021-08-06 20:06:04,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 45.0 percent of original size [2021-08-06 20:06:04,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 20:06:04,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:04,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:04,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224995970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:04,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:04,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-06 20:06:04,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209708157] [2021-08-06 20:06:04,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:06:04,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:06:04,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:06:04,399 INFO L87 Difference]: Start difference. First operand 735 states and 1335 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:04,668 INFO L93 Difference]: Finished difference Result 1340 states and 2233 transitions. [2021-08-06 20:06:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:06:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:04,672 INFO L225 Difference]: With dead ends: 1340 [2021-08-06 20:06:04,672 INFO L226 Difference]: Without dead ends: 1340 [2021-08-06 20:06:04,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:06:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-08-06 20:06:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 997. [2021-08-06 20:06:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.7931726907630523) internal successors, (1786), 996 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1786 transitions. [2021-08-06 20:06:04,689 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1786 transitions. Word has length 29 [2021-08-06 20:06:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:04,689 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1786 transitions. [2021-08-06 20:06:04,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1786 transitions. [2021-08-06 20:06:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:04,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:04,691 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:04,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:04,908 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 [2021-08-06 20:06:04,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1109692081, now seen corresponding path program 9 times [2021-08-06 20:06:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:04,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762462038] [2021-08-06 20:06:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:04,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:04,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:04,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:04,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:06:04,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:06:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:04,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:04,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762462038] [2021-08-06 20:06:04,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762462038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:04,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500311776] [2021-08-06 20:06:04,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:04,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:04,979 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) [2021-08-06 20:06:04,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:06:05,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:05,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:05,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:05,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:06:05,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:06:05,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:05,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:05,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500311776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:05,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:05,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:06:05,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310359043] [2021-08-06 20:06:05,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:05,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:05,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:05,333 INFO L87 Difference]: Start difference. First operand 997 states and 1786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:05,842 INFO L93 Difference]: Finished difference Result 1386 states and 2273 transitions. [2021-08-06 20:06:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:06:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:05,846 INFO L225 Difference]: With dead ends: 1386 [2021-08-06 20:06:05,846 INFO L226 Difference]: Without dead ends: 1386 [2021-08-06 20:06:05,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:06:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-08-06 20:06:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1010. [2021-08-06 20:06:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.7968285431119921) internal successors, (1813), 1009 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1813 transitions. [2021-08-06 20:06:05,880 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1813 transitions. Word has length 29 [2021-08-06 20:06:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:05,880 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1813 transitions. [2021-08-06 20:06:05,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1813 transitions. [2021-08-06 20:06:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:05,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:05,882 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:05,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:06,099 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 [2021-08-06 20:06:06,099 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:06,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:06,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2141332043, now seen corresponding path program 10 times [2021-08-06 20:06:06,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:06,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115977936] [2021-08-06 20:06:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:06,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:06,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:06,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:06,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:06,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115977936] [2021-08-06 20:06:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115977936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:06,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142140945] [2021-08-06 20:06:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:06,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:06,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:06,156 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) [2021-08-06 20:06:06,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:06:06,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:06,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:06,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:06,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:06,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:06,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142140945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:06,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:06,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:06:06,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363961788] [2021-08-06 20:06:06,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:06,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:06,528 INFO L87 Difference]: Start difference. First operand 1010 states and 1813 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:06,996 INFO L93 Difference]: Finished difference Result 1216 states and 2064 transitions. [2021-08-06 20:06:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:06:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:06,999 INFO L225 Difference]: With dead ends: 1216 [2021-08-06 20:06:07,000 INFO L226 Difference]: Without dead ends: 1151 [2021-08-06 20:06:07,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:06:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-08-06 20:06:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 977. [2021-08-06 20:06:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 1.778688524590164) internal successors, (1736), 976 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1736 transitions. [2021-08-06 20:06:07,013 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1736 transitions. Word has length 29 [2021-08-06 20:06:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:07,014 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1736 transitions. [2021-08-06 20:06:07,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1736 transitions. [2021-08-06 20:06:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:07,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:07,015 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:07,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:07,232 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 [2021-08-06 20:06:07,233 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 45684759, now seen corresponding path program 11 times [2021-08-06 20:06:07,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:07,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342734075] [2021-08-06 20:06:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:07,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:07,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:07,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:07,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:06:07,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:06:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:07,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:07,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342734075] [2021-08-06 20:06:07,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342734075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:07,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312392704] [2021-08-06 20:06:07,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:07,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:07,301 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) [2021-08-06 20:06:07,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:06:07,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:07,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:07,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:07,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:06:07,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:06:07,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:06:07,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:07,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312392704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:07,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:07,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:06:07,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591680907] [2021-08-06 20:06:07,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:06:07,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:06:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:06:07,638 INFO L87 Difference]: Start difference. First operand 977 states and 1736 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:07,870 INFO L93 Difference]: Finished difference Result 1365 states and 2263 transitions. [2021-08-06 20:06:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:06:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:07,874 INFO L225 Difference]: With dead ends: 1365 [2021-08-06 20:06:07,874 INFO L226 Difference]: Without dead ends: 1365 [2021-08-06 20:06:07,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:06:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-06 20:06:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 977. [2021-08-06 20:06:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 1.778688524590164) internal successors, (1736), 976 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1736 transitions. [2021-08-06 20:06:07,889 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1736 transitions. Word has length 29 [2021-08-06 20:06:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1736 transitions. [2021-08-06 20:06:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1736 transitions. [2021-08-06 20:06:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:07,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:07,891 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:07,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:08,104 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 [2021-08-06 20:06:08,104 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1077324721, now seen corresponding path program 12 times [2021-08-06 20:06:08,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:08,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991153687] [2021-08-06 20:06:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:08,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:08,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:08,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:08,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:08,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991153687] [2021-08-06 20:06:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991153687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:08,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688009410] [2021-08-06 20:06:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:08,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:08,148 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) [2021-08-06 20:06:08,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:06:08,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:06:08,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:08,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:08,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:06:08,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:08,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:08,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:08,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688009410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:08,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:08,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:06:08,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114116579] [2021-08-06 20:06:08,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:06:08,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:06:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:06:08,505 INFO L87 Difference]: Start difference. First operand 977 states and 1736 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:08,829 INFO L93 Difference]: Finished difference Result 1319 states and 2197 transitions. [2021-08-06 20:06:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:06:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:08,832 INFO L225 Difference]: With dead ends: 1319 [2021-08-06 20:06:08,832 INFO L226 Difference]: Without dead ends: 1242 [2021-08-06 20:06:08,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:06:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-08-06 20:06:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 994. [2021-08-06 20:06:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.770392749244713) internal successors, (1758), 993 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1758 transitions. [2021-08-06 20:06:08,849 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1758 transitions. Word has length 29 [2021-08-06 20:06:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:08,850 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1758 transitions. [2021-08-06 20:06:08,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1758 transitions. [2021-08-06 20:06:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 20:06:08,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:08,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:08,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:09,068 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 [2021-08-06 20:06:09,069 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:09,069 INFO L82 PathProgramCache]: Analyzing trace with hash 638086001, now seen corresponding path program 13 times [2021-08-06 20:06:09,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:09,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384185827] [2021-08-06 20:06:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:09,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:09,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:09,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:09,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:09,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384185827] [2021-08-06 20:06:09,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384185827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:09,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524216187] [2021-08-06 20:06:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:09,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:09,117 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) [2021-08-06 20:06:09,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:06:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:06:09,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:09,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:06:09,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:06:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:06:09,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524216187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:09,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:09,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:06:09,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968973966] [2021-08-06 20:06:09,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:06:09,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:06:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:06:09,484 INFO L87 Difference]: Start difference. First operand 994 states and 1758 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:09,755 INFO L93 Difference]: Finished difference Result 1461 states and 2477 transitions. [2021-08-06 20:06:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:06:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 20:06:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:09,759 INFO L225 Difference]: With dead ends: 1461 [2021-08-06 20:06:09,759 INFO L226 Difference]: Without dead ends: 1452 [2021-08-06 20:06:09,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:06:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-08-06 20:06:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 968. [2021-08-06 20:06:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.7549120992761116) internal successors, (1697), 967 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1697 transitions. [2021-08-06 20:06:09,783 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1697 transitions. Word has length 29 [2021-08-06 20:06:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1697 transitions. [2021-08-06 20:06:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1697 transitions. [2021-08-06 20:06:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:09,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:09,785 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:09,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:10,005 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 [2021-08-06 20:06:10,005 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash -431550871, now seen corresponding path program 14 times [2021-08-06 20:06:10,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:10,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627524563] [2021-08-06 20:06:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:10,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:10,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:10,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627524563] [2021-08-06 20:06:10,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627524563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:10,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468300663] [2021-08-06 20:06:10,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:10,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:10,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:10,090 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) [2021-08-06 20:06:10,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:06:10,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:10,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:10,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 45.0 percent of original size [2021-08-06 20:06:10,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 45.0 percent of original size [2021-08-06 20:06:10,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 20:06:10,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:10,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:06:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:10,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468300663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:10,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:10,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-06 20:06:10,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525223689] [2021-08-06 20:06:10,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:06:10,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:06:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:06:10,540 INFO L87 Difference]: Start difference. First operand 968 states and 1697 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:11,032 INFO L93 Difference]: Finished difference Result 1853 states and 3126 transitions. [2021-08-06 20:06:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:06:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:11,037 INFO L225 Difference]: With dead ends: 1853 [2021-08-06 20:06:11,037 INFO L226 Difference]: Without dead ends: 1853 [2021-08-06 20:06:11,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-08-06 20:06:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1116. [2021-08-06 20:06:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 1.8367713004484305) internal successors, (2048), 1115 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2048 transitions. [2021-08-06 20:06:11,057 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2048 transitions. Word has length 31 [2021-08-06 20:06:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:11,057 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2048 transitions. [2021-08-06 20:06:11,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2048 transitions. [2021-08-06 20:06:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:11,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:11,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:11,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 20:06:11,276 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 [2021-08-06 20:06:11,277 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2069119657, now seen corresponding path program 15 times [2021-08-06 20:06:11,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:11,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735323897] [2021-08-06 20:06:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:11,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:11,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:11,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:06:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:11,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:11,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735323897] [2021-08-06 20:06:11,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735323897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:11,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075860688] [2021-08-06 20:06:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:11,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:11,333 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) [2021-08-06 20:06:11,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:06:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:11,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:11,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:11,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:11,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:11,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075860688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:11,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:11,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:06:11,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198342099] [2021-08-06 20:06:11,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:11,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:11,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:11,848 INFO L87 Difference]: Start difference. First operand 1116 states and 2048 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:12,768 INFO L93 Difference]: Finished difference Result 1844 states and 3416 transitions. [2021-08-06 20:06:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:06:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:12,774 INFO L225 Difference]: With dead ends: 1844 [2021-08-06 20:06:12,774 INFO L226 Difference]: Without dead ends: 1844 [2021-08-06 20:06:12,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:06:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-08-06 20:06:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1126. [2021-08-06 20:06:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 1.8533333333333333) internal successors, (2085), 1125 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 2085 transitions. [2021-08-06 20:06:12,791 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 2085 transitions. Word has length 31 [2021-08-06 20:06:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:12,791 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 2085 transitions. [2021-08-06 20:06:12,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 2085 transitions. [2021-08-06 20:06:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:12,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:12,793 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:12,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 20:06:13,010 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 [2021-08-06 20:06:13,010 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1574086935, now seen corresponding path program 16 times [2021-08-06 20:06:13,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:13,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310827498] [2021-08-06 20:06:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:13,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:13,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:13,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310827498] [2021-08-06 20:06:13,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310827498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:13,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153177644] [2021-08-06 20:06:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:13,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:13,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:13,059 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) [2021-08-06 20:06:13,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:06:13,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-08-06 20:06:13,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:13,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:13,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:13,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153177644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:13,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:13,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:06:13,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699473998] [2021-08-06 20:06:13,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:06:13,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:06:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:06:13,515 INFO L87 Difference]: Start difference. First operand 1126 states and 2085 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:13,786 INFO L93 Difference]: Finished difference Result 1527 states and 2702 transitions. [2021-08-06 20:06:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:06:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:13,791 INFO L225 Difference]: With dead ends: 1527 [2021-08-06 20:06:13,791 INFO L226 Difference]: Without dead ends: 1527 [2021-08-06 20:06:13,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:06:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-08-06 20:06:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1105. [2021-08-06 20:06:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.8297101449275361) internal successors, (2020), 1104 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2020 transitions. [2021-08-06 20:06:13,806 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2020 transitions. Word has length 31 [2021-08-06 20:06:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:13,806 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 2020 transitions. [2021-08-06 20:06:13,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2020 transitions. [2021-08-06 20:06:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:06:13,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:13,808 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:14,025 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 [2021-08-06 20:06:14,025 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1882906929, now seen corresponding path program 17 times [2021-08-06 20:06:14,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:14,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134160094] [2021-08-06 20:06:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:14,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:14,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:14,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134160094] [2021-08-06 20:06:14,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134160094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:14,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92372299] [2021-08-06 20:06:14,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:14,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:14,075 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) [2021-08-06 20:06:14,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:06:14,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 20:06:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:14,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:06:14,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:06:14,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:14,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:06:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:14,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92372299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:14,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:14,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:06:14,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654153953] [2021-08-06 20:06:14,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 20:06:14,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 20:06:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 20:06:14,493 INFO L87 Difference]: Start difference. First operand 1105 states and 2020 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:14,766 INFO L93 Difference]: Finished difference Result 1525 states and 2591 transitions. [2021-08-06 20:06:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:06:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 20:06:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:14,771 INFO L225 Difference]: With dead ends: 1525 [2021-08-06 20:06:14,771 INFO L226 Difference]: Without dead ends: 1525 [2021-08-06 20:06:14,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:06:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-08-06 20:06:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 963. [2021-08-06 20:06:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.66008316008316) internal successors, (1597), 962 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1597 transitions. [2021-08-06 20:06:14,785 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1597 transitions. Word has length 31 [2021-08-06 20:06:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:14,785 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1597 transitions. [2021-08-06 20:06:14,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1597 transitions. [2021-08-06 20:06:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 20:06:14,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:14,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:14,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:15,005 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 [2021-08-06 20:06:15,005 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:15,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1379484392, now seen corresponding path program 18 times [2021-08-06 20:06:15,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:15,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46807825] [2021-08-06 20:06:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:15,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:15,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:15,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46807825] [2021-08-06 20:06:15,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46807825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:15,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796312983] [2021-08-06 20:06:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:15,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:15,055 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) [2021-08-06 20:06:15,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:06:15,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:06:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:06:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:15,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:06:15,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:06:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:06:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796312983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:15,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:15,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 20:06:15,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764946803] [2021-08-06 20:06:15,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:06:15,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:06:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:06:15,474 INFO L87 Difference]: Start difference. First operand 963 states and 1597 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:15,488 INFO L93 Difference]: Finished difference Result 1478 states and 2464 transitions. [2021-08-06 20:06:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:06:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 20:06:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:15,492 INFO L225 Difference]: With dead ends: 1478 [2021-08-06 20:06:15,492 INFO L226 Difference]: Without dead ends: 1478 [2021-08-06 20:06:15,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:06:15,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-08-06 20:06:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1383. [2021-08-06 20:06:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.6671490593342981) internal successors, (2304), 1382 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2304 transitions. [2021-08-06 20:06:15,528 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2304 transitions. Word has length 33 [2021-08-06 20:06:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 2304 transitions. [2021-08-06 20:06:15,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2304 transitions. [2021-08-06 20:06:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:15,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:15,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:15,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 20:06:15,772 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 [2021-08-06 20:06:15,772 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash -668024378, now seen corresponding path program 19 times [2021-08-06 20:06:15,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:15,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665354760] [2021-08-06 20:06:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:15,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:15,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:15,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:15,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:15,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665354760] [2021-08-06 20:06:15,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665354760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:15,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801339754] [2021-08-06 20:06:15,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:15,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:15,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:15,973 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) [2021-08-06 20:06:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:06:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-06 20:06:16,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-08-06 20:06:16,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:16,593 INFO L388 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 35 treesize of output 28 [2021-08-06 20:06:16,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:06:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:16,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801339754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:16,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:16,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-08-06 20:06:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727078700] [2021-08-06 20:06:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:06:16,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:06:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:06:16,630 INFO L87 Difference]: Start difference. First operand 1383 states and 2304 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) 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) [2021-08-06 20:06:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:16,748 INFO L93 Difference]: Finished difference Result 2302 states and 4101 transitions. [2021-08-06 20:06:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) 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 35 [2021-08-06 20:06:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:16,765 INFO L225 Difference]: With dead ends: 2302 [2021-08-06 20:06:16,765 INFO L226 Difference]: Without dead ends: 2293 [2021-08-06 20:06:16,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:06:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-08-06 20:06:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1556. [2021-08-06 20:06:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 1.6926045016077171) internal successors, (2632), 1555 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 2632 transitions. [2021-08-06 20:06:16,786 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 2632 transitions. Word has length 35 [2021-08-06 20:06:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:16,786 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 2632 transitions. [2021-08-06 20:06:16,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) 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) [2021-08-06 20:06:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 2632 transitions. [2021-08-06 20:06:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:16,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:16,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:16,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 20:06:17,006 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 [2021-08-06 20:06:17,006 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:17,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:17,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1222815046, now seen corresponding path program 20 times [2021-08-06 20:06:17,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:17,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501294092] [2021-08-06 20:06:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:17,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:17,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:17,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:17,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:17,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501294092] [2021-08-06 20:06:17,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501294092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:17,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662594568] [2021-08-06 20:06:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:17,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:17,205 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) [2021-08-06 20:06:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:06:17,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:17,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:06:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:17,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-06 20:06:17,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:17,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 47 [2021-08-06 20:06:18,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:18,243 INFO L388 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 39 treesize of output 30 [2021-08-06 20:06:18,246 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:06:18,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2021-08-06 20:06:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:18,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662594568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:18,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:18,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:06:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836474789] [2021-08-06 20:06:18,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:06:18,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:06:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2021-08-06 20:06:18,290 INFO L87 Difference]: Start difference. First operand 1556 states and 2632 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:21,396 INFO L93 Difference]: Finished difference Result 2400 states and 4234 transitions. [2021-08-06 20:06:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:06:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:21,400 INFO L225 Difference]: With dead ends: 2400 [2021-08-06 20:06:21,400 INFO L226 Difference]: Without dead ends: 2391 [2021-08-06 20:06:21,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2021-08-06 20:06:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-06 20:06:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1621. [2021-08-06 20:06:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 1.6882716049382716) internal successors, (2735), 1620 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2735 transitions. [2021-08-06 20:06:21,420 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2735 transitions. Word has length 35 [2021-08-06 20:06:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:21,421 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 2735 transitions. [2021-08-06 20:06:21,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2735 transitions. [2021-08-06 20:06:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:21,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:21,423 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:21,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:21,642 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 [2021-08-06 20:06:21,643 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash -570130042, now seen corresponding path program 21 times [2021-08-06 20:06:21,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:21,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447195836] [2021-08-06 20:06:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:21,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:21,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:21,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:21,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447195836] [2021-08-06 20:06:21,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447195836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035363841] [2021-08-06 20:06:21,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:21,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:21,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:21,818 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) [2021-08-06 20:06:21,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:06:22,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:22,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:22,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-08-06 20:06:22,520 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-08-06 20:06:22,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:22,563 INFO L388 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 31 treesize of output 26 [2021-08-06 20:06:22,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:06:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035363841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:22,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:06:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798693482] [2021-08-06 20:06:22,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:06:22,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:06:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:06:22,615 INFO L87 Difference]: Start difference. First operand 1621 states and 2735 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:23,127 INFO L93 Difference]: Finished difference Result 2559 states and 4395 transitions. [2021-08-06 20:06:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:06:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:23,130 INFO L225 Difference]: With dead ends: 2559 [2021-08-06 20:06:23,130 INFO L226 Difference]: Without dead ends: 2534 [2021-08-06 20:06:23,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:06:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-06 20:06:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1647. [2021-08-06 20:06:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 1.686512758201701) internal successors, (2776), 1646 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2776 transitions. [2021-08-06 20:06:23,149 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2776 transitions. Word has length 35 [2021-08-06 20:06:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:23,150 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2776 transitions. [2021-08-06 20:06:23,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2776 transitions. [2021-08-06 20:06:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:23,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:23,152 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:23,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:23,369 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 [2021-08-06 20:06:23,369 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 515168454, now seen corresponding path program 22 times [2021-08-06 20:06:23,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:23,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017085341] [2021-08-06 20:06:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:23,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:23,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:23,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:23,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:23,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017085341] [2021-08-06 20:06:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017085341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:23,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083150819] [2021-08-06 20:06:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:23,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:23,544 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) [2021-08-06 20:06:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:06:23,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:23,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:06:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:24,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-08-06 20:06:24,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-08-06 20:06:25,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:25,191 INFO L388 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 39 treesize of output 30 [2021-08-06 20:06:25,194 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:06:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2021-08-06 20:06:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083150819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:25,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:06:25,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373632679] [2021-08-06 20:06:25,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:06:25,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:06:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=190, Unknown=3, NotChecked=0, Total=240 [2021-08-06 20:06:25,240 INFO L87 Difference]: Start difference. First operand 1647 states and 2776 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:31,613 INFO L93 Difference]: Finished difference Result 2450 states and 4253 transitions. [2021-08-06 20:06:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:06:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:31,617 INFO L225 Difference]: With dead ends: 2450 [2021-08-06 20:06:31,617 INFO L226 Difference]: Without dead ends: 2441 [2021-08-06 20:06:31,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 973.2ms TimeCoverageRelationStatistics Valid=47, Invalid=190, Unknown=3, NotChecked=0, Total=240 [2021-08-06 20:06:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-08-06 20:06:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1722. [2021-08-06 20:06:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 1.6966879721092387) internal successors, (2920), 1721 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2920 transitions. [2021-08-06 20:06:31,637 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2920 transitions. Word has length 35 [2021-08-06 20:06:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:31,637 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 2920 transitions. [2021-08-06 20:06:31,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2920 transitions. [2021-08-06 20:06:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:31,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:31,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:31,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:31,856 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 [2021-08-06 20:06:31,857 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1277776634, now seen corresponding path program 23 times [2021-08-06 20:06:31,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:31,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704578644] [2021-08-06 20:06:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:31,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:31,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:31,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:32,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:32,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704578644] [2021-08-06 20:06:32,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704578644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:32,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414441033] [2021-08-06 20:06:32,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:32,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:32,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:32,007 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) [2021-08-06 20:06:32,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:06:32,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:06:32,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-08-06 20:06:32,766 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-08-06 20:06:33,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:33,326 INFO L388 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 31 treesize of output 26 [2021-08-06 20:06:33,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:33,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:06:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414441033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:33,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:33,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:06:33,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577872409] [2021-08-06 20:06:33,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:06:33,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:06:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:06:33,386 INFO L87 Difference]: Start difference. First operand 1722 states and 2920 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) [2021-08-06 20:06:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:33,515 INFO L93 Difference]: Finished difference Result 2516 states and 4276 transitions. [2021-08-06 20:06:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:33,515 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 35 [2021-08-06 20:06:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:33,518 INFO L225 Difference]: With dead ends: 2516 [2021-08-06 20:06:33,518 INFO L226 Difference]: Without dead ends: 2491 [2021-08-06 20:06:33,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:06:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-08-06 20:06:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1703. [2021-08-06 20:06:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.6827262044653348) internal successors, (2864), 1702 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2864 transitions. [2021-08-06 20:06:33,542 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2864 transitions. Word has length 35 [2021-08-06 20:06:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:33,542 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 2864 transitions. [2021-08-06 20:06:33,542 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) [2021-08-06 20:06:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2864 transitions. [2021-08-06 20:06:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:33,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:33,544 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:33,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:33,760 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 [2021-08-06 20:06:33,760 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2138333510, now seen corresponding path program 24 times [2021-08-06 20:06:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:33,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413337274] [2021-08-06 20:06:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:33,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:33,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:33,793 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:33,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413337274] [2021-08-06 20:06:33,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413337274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:33,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418256196] [2021-08-06 20:06:33,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:33,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:33,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:34,009 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) [2021-08-06 20:06:34,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:06:34,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:06:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:34,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:34,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-08-06 20:06:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-06 20:06:34,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:34,850 INFO L388 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 31 treesize of output 26 [2021-08-06 20:06:34,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:06:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:34,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418256196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:34,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:34,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:06:34,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364560253] [2021-08-06 20:06:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:06:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:06:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:06:34,905 INFO L87 Difference]: Start difference. First operand 1703 states and 2864 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:06:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:35,778 INFO L93 Difference]: Finished difference Result 2594 states and 4387 transitions. [2021-08-06 20:06:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 35 [2021-08-06 20:06:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:35,782 INFO L225 Difference]: With dead ends: 2594 [2021-08-06 20:06:35,782 INFO L226 Difference]: Without dead ends: 2569 [2021-08-06 20:06:35,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:06:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-06 20:06:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1749. [2021-08-06 20:06:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 1.6784897025171626) internal successors, (2934), 1748 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2934 transitions. [2021-08-06 20:06:35,831 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2934 transitions. Word has length 35 [2021-08-06 20:06:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 2934 transitions. [2021-08-06 20:06:35,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:06:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2934 transitions. [2021-08-06 20:06:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:35,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:35,834 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:35,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:36,051 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 [2021-08-06 20:06:36,051 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:36,051 INFO L82 PathProgramCache]: Analyzing trace with hash -844723860, now seen corresponding path program 25 times [2021-08-06 20:06:36,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:36,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666305308] [2021-08-06 20:06:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:36,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:36,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:36,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:36,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:36,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:36,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:36,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666305308] [2021-08-06 20:06:36,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666305308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:36,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396382834] [2021-08-06 20:06:36,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:36,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:36,291 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) [2021-08-06 20:06:36,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:06:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:06:36,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:37,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-08-06 20:06:37,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:37,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:06:38,697 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:06:38,697 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:06:38,701 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:06:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396382834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:38,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:38,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:06:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567786596] [2021-08-06 20:06:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:06:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:06:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=284, Unknown=2, NotChecked=0, Total=342 [2021-08-06 20:06:38,743 INFO L87 Difference]: Start difference. First operand 1749 states and 2934 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-08-06 20:06:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:38,923 INFO L93 Difference]: Finished difference Result 2580 states and 4470 transitions. [2021-08-06 20:06:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:06:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 35 [2021-08-06 20:06:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:38,927 INFO L225 Difference]: With dead ends: 2580 [2021-08-06 20:06:38,928 INFO L226 Difference]: Without dead ends: 2557 [2021-08-06 20:06:38,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1268.3ms TimeCoverageRelationStatistics Valid=61, Invalid=317, Unknown=2, NotChecked=0, Total=380 [2021-08-06 20:06:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-08-06 20:06:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1840. [2021-08-06 20:06:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 1.6916802610114192) internal successors, (3111), 1839 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 3111 transitions. [2021-08-06 20:06:38,947 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 3111 transitions. Word has length 35 [2021-08-06 20:06:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:38,947 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 3111 transitions. [2021-08-06 20:06:38,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-08-06 20:06:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 3111 transitions. [2021-08-06 20:06:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:38,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:38,949 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:38,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:39,149 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 [2021-08-06 20:06:39,150 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1230984428, now seen corresponding path program 26 times [2021-08-06 20:06:39,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:39,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726942470] [2021-08-06 20:06:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:39,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:39,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:39,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:39,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:39,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:39,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:39,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726942470] [2021-08-06 20:06:39,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726942470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:39,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519030498] [2021-08-06 20:06:39,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:39,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:39,324 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) [2021-08-06 20:06:39,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:06:39,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:06:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:40,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-08-06 20:06:40,437 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-06 20:06:40,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 42 [2021-08-06 20:06:40,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:40,906 INFO L388 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 31 treesize of output 26 [2021-08-06 20:06:40,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:40,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:06:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519030498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:40,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:40,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:06:40,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873677057] [2021-08-06 20:06:40,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:06:40,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:06:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=280, Unknown=1, NotChecked=0, Total=342 [2021-08-06 20:06:40,964 INFO L87 Difference]: Start difference. First operand 1840 states and 3111 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:06:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:43,235 INFO L93 Difference]: Finished difference Result 2716 states and 4617 transitions. [2021-08-06 20:06:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:06:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 35 [2021-08-06 20:06:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:43,240 INFO L225 Difference]: With dead ends: 2716 [2021-08-06 20:06:43,240 INFO L226 Difference]: Without dead ends: 2678 [2021-08-06 20:06:43,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2021-08-06 20:06:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-08-06 20:06:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1846. [2021-08-06 20:06:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 1.6899728997289973) internal successors, (3118), 1845 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 3118 transitions. [2021-08-06 20:06:43,260 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 3118 transitions. Word has length 35 [2021-08-06 20:06:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:43,260 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 3118 transitions. [2021-08-06 20:06:43,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:06:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 3118 transitions. [2021-08-06 20:06:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:43,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:43,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:43,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:43,480 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 [2021-08-06 20:06:43,480 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:43,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1556504684, now seen corresponding path program 27 times [2021-08-06 20:06:43,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:43,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349828696] [2021-08-06 20:06:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:43,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:43,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:43,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:43,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:43,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:06:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:43,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349828696] [2021-08-06 20:06:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349828696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:43,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335595651] [2021-08-06 20:06:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:43,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:43,651 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) [2021-08-06 20:06:43,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:06:44,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:06:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:06:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:44,495 INFO L354 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-08-06 20:06:44,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 40 [2021-08-06 20:06:44,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-08-06 20:06:44,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:44,905 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 65 [2021-08-06 20:06:44,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2021-08-06 20:06:44,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:06:44,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:06:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:45,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335595651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:45,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:45,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:06:45,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572343339] [2021-08-06 20:06:45,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:06:45,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:06:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:06:45,013 INFO L87 Difference]: Start difference. First operand 1846 states and 3118 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-08-06 20:06:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:51,159 INFO L93 Difference]: Finished difference Result 3140 states and 5308 transitions. [2021-08-06 20:06:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:06:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 35 [2021-08-06 20:06:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:51,164 INFO L225 Difference]: With dead ends: 3140 [2021-08-06 20:06:51,164 INFO L226 Difference]: Without dead ends: 3110 [2021-08-06 20:06:51,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-08-06 20:06:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1875. [2021-08-06 20:06:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.6883671291355389) internal successors, (3164), 1874 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 3164 transitions. [2021-08-06 20:06:51,185 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 3164 transitions. Word has length 35 [2021-08-06 20:06:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:51,185 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 3164 transitions. [2021-08-06 20:06:51,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-08-06 20:06:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 3164 transitions. [2021-08-06 20:06:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:51,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:51,188 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:51,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:51,406 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 [2021-08-06 20:06:51,406 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash 63772166, now seen corresponding path program 28 times [2021-08-06 20:06:51,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:51,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384488482] [2021-08-06 20:06:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:51,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:51,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:51,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:51,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384488482] [2021-08-06 20:06:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384488482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:51,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423883827] [2021-08-06 20:06:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:51,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:51,586 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) [2021-08-06 20:06:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:06:52,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:52,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:52,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:06:52,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:52,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-06 20:06:52,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:52,589 INFO L388 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 35 treesize of output 28 [2021-08-06 20:06:52,592 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:06:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423883827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:52,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:52,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:06:52,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660219394] [2021-08-06 20:06:52,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:06:52,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:52,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:06:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:06:52,627 INFO L87 Difference]: Start difference. First operand 1875 states and 3164 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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) [2021-08-06 20:06:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:53,776 INFO L93 Difference]: Finished difference Result 2441 states and 4270 transitions. [2021-08-06 20:06:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:06:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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 35 [2021-08-06 20:06:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:53,780 INFO L225 Difference]: With dead ends: 2441 [2021-08-06 20:06:53,780 INFO L226 Difference]: Without dead ends: 2413 [2021-08-06 20:06:53,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:06:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-08-06 20:06:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1940. [2021-08-06 20:06:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 1.6921093347086127) internal successors, (3281), 1939 states have internal predecessors, (3281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 3281 transitions. [2021-08-06 20:06:53,799 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 3281 transitions. Word has length 35 [2021-08-06 20:06:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:53,799 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 3281 transitions. [2021-08-06 20:06:53,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 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) [2021-08-06 20:06:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 3281 transitions. [2021-08-06 20:06:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:53,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:53,801 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:53,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:54,019 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 [2021-08-06 20:06:54,019 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:54,019 INFO L82 PathProgramCache]: Analyzing trace with hash 883130890, now seen corresponding path program 29 times [2021-08-06 20:06:54,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:54,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493825128] [2021-08-06 20:06:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:54,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:54,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:54,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:54,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:06:54,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:06:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:54,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:54,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493825128] [2021-08-06 20:06:54,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493825128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:54,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855418091] [2021-08-06 20:06:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:54,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:54,197 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) [2021-08-06 20:06:54,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:06:54,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:06:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:06:55,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:55,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-08-06 20:06:56,119 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-06 20:06:56,119 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2021-08-06 20:06:56,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:06:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:56,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855418091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:56,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:56,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:06:56,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389158663] [2021-08-06 20:06:56,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:06:56,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:06:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=290, Unknown=2, NotChecked=0, Total=342 [2021-08-06 20:06:56,163 INFO L87 Difference]: Start difference. First operand 1940 states and 3281 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-08-06 20:06:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:58,479 INFO L93 Difference]: Finished difference Result 2408 states and 4209 transitions. [2021-08-06 20:06:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:06:58,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 35 [2021-08-06 20:06:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:58,483 INFO L225 Difference]: With dead ends: 2408 [2021-08-06 20:06:58,483 INFO L226 Difference]: Without dead ends: 2403 [2021-08-06 20:06:58,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 895.3ms TimeCoverageRelationStatistics Valid=65, Invalid=395, Unknown=2, NotChecked=0, Total=462 [2021-08-06 20:06:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-08-06 20:06:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1964. [2021-08-06 20:06:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.6882322975038206) internal successors, (3314), 1963 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3314 transitions. [2021-08-06 20:06:58,502 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3314 transitions. Word has length 35 [2021-08-06 20:06:58,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:58,502 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 3314 transitions. [2021-08-06 20:06:58,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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) [2021-08-06 20:06:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3314 transitions. [2021-08-06 20:06:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:06:58,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:58,504 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:58,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:58,722 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 [2021-08-06 20:06:58,723 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:06:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:58,723 INFO L82 PathProgramCache]: Analyzing trace with hash 773081670, now seen corresponding path program 30 times [2021-08-06 20:06:58,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:58,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706041723] [2021-08-06 20:06:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:58,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:58,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:58,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:06:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:58,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:58,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706041723] [2021-08-06 20:06:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706041723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:58,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374194657] [2021-08-06 20:06:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:58,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:58,884 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) [2021-08-06 20:06:58,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:06:59,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:06:59,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:06:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:59,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:06:59,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:59,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-06 20:06:59,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:06:59,969 INFO L388 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 35 treesize of output 28 [2021-08-06 20:06:59,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:06:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:07:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:00,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374194657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:00,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:07:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779860849] [2021-08-06 20:07:00,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:07:00,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:07:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:07:00,006 INFO L87 Difference]: Start difference. First operand 1964 states and 3314 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:07:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:01,184 INFO L93 Difference]: Finished difference Result 2755 states and 4917 transitions. [2021-08-06 20:07:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:07:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 35 [2021-08-06 20:07:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:01,188 INFO L225 Difference]: With dead ends: 2755 [2021-08-06 20:07:01,188 INFO L226 Difference]: Without dead ends: 2746 [2021-08-06 20:07:01,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:07:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-08-06 20:07:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1973. [2021-08-06 20:07:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.6942190669371198) internal successors, (3341), 1972 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3341 transitions. [2021-08-06 20:07:01,208 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3341 transitions. Word has length 35 [2021-08-06 20:07:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:01,209 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 3341 transitions. [2021-08-06 20:07:01,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:07:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3341 transitions. [2021-08-06 20:07:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:01,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:01,211 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:01,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:01,429 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 [2021-08-06 20:07:01,429 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1874575750, now seen corresponding path program 31 times [2021-08-06 20:07:01,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:01,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736121103] [2021-08-06 20:07:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:01,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:01,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:01,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:01,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:01,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736121103] [2021-08-06 20:07:01,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736121103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:01,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772775983] [2021-08-06 20:07:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:07:01,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:01,592 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) [2021-08-06 20:07:01,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:07:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:02,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:07:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:07:02,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:02,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 56 [2021-08-06 20:07:03,308 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-08-06 20:07:03,308 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 40 [2021-08-06 20:07:03,312 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 20:07:03,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2021-08-06 20:07:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:03,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772775983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:03,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:03,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:07:03,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506700135] [2021-08-06 20:07:03,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:07:03,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:07:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=192, Unknown=1, NotChecked=0, Total=240 [2021-08-06 20:07:03,347 INFO L87 Difference]: Start difference. First operand 1973 states and 3341 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:07,826 INFO L93 Difference]: Finished difference Result 2842 states and 5025 transitions. [2021-08-06 20:07:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:07:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:07,829 INFO L225 Difference]: With dead ends: 2842 [2021-08-06 20:07:07,829 INFO L226 Difference]: Without dead ends: 2833 [2021-08-06 20:07:07,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=53, Invalid=218, Unknown=1, NotChecked=0, Total=272 [2021-08-06 20:07:07,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-08-06 20:07:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1983. [2021-08-06 20:07:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 1.700302724520686) internal successors, (3370), 1982 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3370 transitions. [2021-08-06 20:07:07,848 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3370 transitions. Word has length 35 [2021-08-06 20:07:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:07,848 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 3370 transitions. [2021-08-06 20:07:07,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3370 transitions. [2021-08-06 20:07:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:07,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:07,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:07,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:07:08,069 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 [2021-08-06 20:07:08,069 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:08,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:08,069 INFO L82 PathProgramCache]: Analyzing trace with hash 81630662, now seen corresponding path program 32 times [2021-08-06 20:07:08,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:08,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458881286] [2021-08-06 20:07:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:08,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:08,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:08,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:08,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458881286] [2021-08-06 20:07:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458881286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:08,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574659279] [2021-08-06 20:07:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:07:08,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:08,235 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) [2021-08-06 20:07:08,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:07:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:07:09,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:07:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:09,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:07:09,481 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-06 20:07:09,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-08-06 20:07:09,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:09,524 INFO L388 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 31 treesize of output 26 [2021-08-06 20:07:09,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:09,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:07:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:09,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574659279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:09,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:09,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:07:09,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124268652] [2021-08-06 20:07:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:07:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:07:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:07:09,575 INFO L87 Difference]: Start difference. First operand 1983 states and 3370 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:10,172 INFO L93 Difference]: Finished difference Result 2891 states and 5014 transitions. [2021-08-06 20:07:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:07:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:10,175 INFO L225 Difference]: With dead ends: 2891 [2021-08-06 20:07:10,175 INFO L226 Difference]: Without dead ends: 2845 [2021-08-06 20:07:10,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:07:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2021-08-06 20:07:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 1961. [2021-08-06 20:07:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 1.6877551020408164) internal successors, (3308), 1960 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3308 transitions. [2021-08-06 20:07:10,219 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3308 transitions. Word has length 35 [2021-08-06 20:07:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:10,220 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3308 transitions. [2021-08-06 20:07:10,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3308 transitions. [2021-08-06 20:07:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:10,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:10,222 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:10,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:10,440 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 [2021-08-06 20:07:10,440 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 205944022, now seen corresponding path program 33 times [2021-08-06 20:07:10,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:10,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611158021] [2021-08-06 20:07:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:10,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:10,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:10,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:10,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:10,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:10,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:10,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:10,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:10,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:10,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 78.3 percent of original size [2021-08-06 20:07:10,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 78.3 percent of original size [2021-08-06 20:07:10,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:07:10,594 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:07:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:10,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:10,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611158021] [2021-08-06 20:07:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611158021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:10,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522627509] [2021-08-06 20:07:10,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:07:10,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:10,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:10,633 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) [2021-08-06 20:07:10,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:07:11,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:07:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:07:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:11,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:07:12,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:12,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-08-06 20:07:13,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:13,260 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-08-06 20:07:13,271 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-06 20:07:13,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 49 [2021-08-06 20:07:13,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:07:13,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:07:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:13,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522627509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:13,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:13,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 20:07:13,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637016945] [2021-08-06 20:07:13,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:07:13,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:07:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=288, Unknown=4, NotChecked=0, Total=342 [2021-08-06 20:07:13,388 INFO L87 Difference]: Start difference. First operand 1961 states and 3308 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) [2021-08-06 20:07:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:37,974 INFO L93 Difference]: Finished difference Result 2850 states and 4966 transitions. [2021-08-06 20:07:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:07:37,974 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 35 [2021-08-06 20:07:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:37,978 INFO L225 Difference]: With dead ends: 2850 [2021-08-06 20:07:37,978 INFO L226 Difference]: Without dead ends: 2789 [2021-08-06 20:07:37,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5033.9ms TimeCoverageRelationStatistics Valid=138, Invalid=904, Unknown=14, NotChecked=0, Total=1056 [2021-08-06 20:07:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-08-06 20:07:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 1999. [2021-08-06 20:07:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 1.6916916916916918) internal successors, (3380), 1998 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3380 transitions. [2021-08-06 20:07:37,999 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3380 transitions. Word has length 35 [2021-08-06 20:07:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:38,000 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 3380 transitions. [2021-08-06 20:07:38,000 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) [2021-08-06 20:07:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3380 transitions. [2021-08-06 20:07:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:38,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:38,002 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:38,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:38,220 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 [2021-08-06 20:07:38,221 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1209950606, now seen corresponding path program 34 times [2021-08-06 20:07:38,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:38,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814849469] [2021-08-06 20:07:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:38,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:38,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:38,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:38,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:38,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:38,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:38,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:38,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:38,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:07:38,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:38,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814849469] [2021-08-06 20:07:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814849469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:38,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427125766] [2021-08-06 20:07:38,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:07:38,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:38,399 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) [2021-08-06 20:07:38,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:07:39,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:07:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:07:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:39,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:07:39,724 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-06 20:07:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 42 [2021-08-06 20:07:40,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:40,590 INFO L388 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 31 treesize of output 26 [2021-08-06 20:07:40,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:40,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:07:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427125766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:40,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:40,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:07:40,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945838137] [2021-08-06 20:07:40,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:07:40,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:07:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=248, Unknown=2, NotChecked=0, Total=306 [2021-08-06 20:07:40,696 INFO L87 Difference]: Start difference. First operand 1999 states and 3380 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:07:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:41,900 INFO L93 Difference]: Finished difference Result 2469 states and 4187 transitions. [2021-08-06 20:07:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:07:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 35 [2021-08-06 20:07:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:41,903 INFO L225 Difference]: With dead ends: 2469 [2021-08-06 20:07:41,903 INFO L226 Difference]: Without dead ends: 2439 [2021-08-06 20:07:41,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=79, Invalid=381, Unknown=2, NotChecked=0, Total=462 [2021-08-06 20:07:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2021-08-06 20:07:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1999. [2021-08-06 20:07:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 1.6916916916916918) internal successors, (3380), 1998 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3380 transitions. [2021-08-06 20:07:41,922 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3380 transitions. Word has length 35 [2021-08-06 20:07:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:41,922 INFO L470 AbstractCegarLoop]: Abstraction has 1999 states and 3380 transitions. [2021-08-06 20:07:41,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:07:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3380 transitions. [2021-08-06 20:07:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:41,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:41,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:41,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:42,140 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 [2021-08-06 20:07:42,140 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1612858602, now seen corresponding path program 35 times [2021-08-06 20:07:42,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:42,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737521336] [2021-08-06 20:07:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:42,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:42,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:42,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:42,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:42,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:42,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:42,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:42,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:42,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737521336] [2021-08-06 20:07:42,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737521336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:42,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864690826] [2021-08-06 20:07:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:07:42,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:42,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:42,307 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) [2021-08-06 20:07:42,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:07:43,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:07:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:07:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:43,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-08-06 20:07:43,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:43,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:07:44,668 INFO L354 Elim1Store]: treesize reduction 29, result has 45.3 percent of original size [2021-08-06 20:07:44,668 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 41 [2021-08-06 20:07:44,671 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:07:44,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2021-08-06 20:07:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:44,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864690826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:44,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:44,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:07:44,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716274369] [2021-08-06 20:07:44,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:07:44,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:44,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:07:44,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=288, Unknown=2, NotChecked=0, Total=342 [2021-08-06 20:07:44,707 INFO L87 Difference]: Start difference. First operand 1999 states and 3380 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:50,801 INFO L93 Difference]: Finished difference Result 2879 states and 4996 transitions. [2021-08-06 20:07:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:07:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:50,804 INFO L225 Difference]: With dead ends: 2879 [2021-08-06 20:07:50,804 INFO L226 Difference]: Without dead ends: 2856 [2021-08-06 20:07:50,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=57, Invalid=321, Unknown=2, NotChecked=0, Total=380 [2021-08-06 20:07:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-08-06 20:07:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2061. [2021-08-06 20:07:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 1.7004854368932039) internal successors, (3503), 2060 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3503 transitions. [2021-08-06 20:07:50,825 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3503 transitions. Word has length 35 [2021-08-06 20:07:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:50,825 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 3503 transitions. [2021-08-06 20:07:50,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3503 transitions. [2021-08-06 20:07:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:50,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:50,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:50,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 20:07:51,041 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 [2021-08-06 20:07:51,042 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash 462849686, now seen corresponding path program 36 times [2021-08-06 20:07:51,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:51,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99867465] [2021-08-06 20:07:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:51,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:51,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:51,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:51,083 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:51,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:51,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:51,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:51,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:51,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99867465] [2021-08-06 20:07:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99867465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:51,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599772066] [2021-08-06 20:07:51,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:07:51,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:51,218 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) [2021-08-06 20:07:51,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:07:52,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:07:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:07:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-08-06 20:07:52,700 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:07:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2021-08-06 20:07:53,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:53,287 INFO L388 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 31 treesize of output 26 [2021-08-06 20:07:53,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:07:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:53,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599772066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:53,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:53,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:07:53,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274282849] [2021-08-06 20:07:53,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:07:53,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:07:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=282, Unknown=1, NotChecked=0, Total=342 [2021-08-06 20:07:53,349 INFO L87 Difference]: Start difference. First operand 2061 states and 3503 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:53,534 INFO L93 Difference]: Finished difference Result 2964 states and 5034 transitions. [2021-08-06 20:07:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:07:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:07:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:53,537 INFO L225 Difference]: With dead ends: 2964 [2021-08-06 20:07:53,537 INFO L226 Difference]: Without dead ends: 2926 [2021-08-06 20:07:53,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 766.0ms TimeCoverageRelationStatistics Valid=65, Invalid=314, Unknown=1, NotChecked=0, Total=380 [2021-08-06 20:07:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-06 20:07:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2018. [2021-08-06 20:07:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 1.7010411502231035) internal successors, (3431), 2017 states have internal predecessors, (3431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3431 transitions. [2021-08-06 20:07:53,583 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3431 transitions. Word has length 35 [2021-08-06 20:07:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:53,583 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 3431 transitions. [2021-08-06 20:07:53,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3431 transitions. [2021-08-06 20:07:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:53,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:53,586 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:53,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:53,801 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 [2021-08-06 20:07:53,801 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 788369942, now seen corresponding path program 37 times [2021-08-06 20:07:53,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:53,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171500988] [2021-08-06 20:07:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:53,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:53,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:53,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:53,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:53,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:53,866 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:53,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:53,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:53,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171500988] [2021-08-06 20:07:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171500988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:53,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268563834] [2021-08-06 20:07:53,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:07:53,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:53,948 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) [2021-08-06 20:07:53,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:07:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:07:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:55,265 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:07:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 35 [2021-08-06 20:07:55,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-08-06 20:07:55,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:55,360 INFO L388 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 31 treesize of output 26 [2021-08-06 20:07:55,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:55,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:07:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:55,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268563834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:55,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:55,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-08-06 20:07:55,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386589355] [2021-08-06 20:07:55,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:07:55,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:55,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:07:55,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:07:55,410 INFO L87 Difference]: Start difference. First operand 2018 states and 3431 transitions. Second operand has 18 states, 18 states have (on average 3.0) 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) [2021-08-06 20:07:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:57,066 INFO L93 Difference]: Finished difference Result 2882 states and 4829 transitions. [2021-08-06 20:07:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:07:57,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) 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 35 [2021-08-06 20:07:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:57,069 INFO L225 Difference]: With dead ends: 2882 [2021-08-06 20:07:57,069 INFO L226 Difference]: Without dead ends: 2852 [2021-08-06 20:07:57,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:07:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-08-06 20:07:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2006. [2021-08-06 20:07:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.6937655860349128) internal successors, (3396), 2005 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3396 transitions. [2021-08-06 20:07:57,113 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3396 transitions. Word has length 35 [2021-08-06 20:07:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:57,114 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 3396 transitions. [2021-08-06 20:07:57,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) 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) [2021-08-06 20:07:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3396 transitions. [2021-08-06 20:07:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:07:57,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:57,116 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:57,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:57,334 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 [2021-08-06 20:07:57,335 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:07:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash -246738512, now seen corresponding path program 38 times [2021-08-06 20:07:57,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:57,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792082749] [2021-08-06 20:07:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:57,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:57,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:57,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:07:57,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:57,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:07:57,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:57,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:07:57,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:57,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:07:57,437 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:57,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:07:57,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 78.3 percent of original size [2021-08-06 20:07:57,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 78.3 percent of original size [2021-08-06 20:07:57,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:07:57,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:07:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:57,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:57,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792082749] [2021-08-06 20:07:57,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792082749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:57,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984234030] [2021-08-06 20:07:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:07:57,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:57,517 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) [2021-08-06 20:07:57,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:07:58,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:07:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:07:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:58,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:07:59,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:07:59,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:08:01,239 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:08:01,240 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:08:01,243 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:08:01,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:08:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:01,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984234030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:01,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:01,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:08:01,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295316734] [2021-08-06 20:08:01,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:08:01,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:08:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=254, Unknown=5, NotChecked=0, Total=306 [2021-08-06 20:08:01,279 INFO L87 Difference]: Start difference. First operand 2006 states and 3396 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:01,539 INFO L93 Difference]: Finished difference Result 2447 states and 4208 transitions. [2021-08-06 20:08:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:08:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:01,542 INFO L225 Difference]: With dead ends: 2447 [2021-08-06 20:08:01,542 INFO L226 Difference]: Without dead ends: 2412 [2021-08-06 20:08:01,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=52, Invalid=285, Unknown=5, NotChecked=0, Total=342 [2021-08-06 20:08:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-06 20:08:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2040. [2021-08-06 20:08:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2039 states have (on average 1.6944580676802354) internal successors, (3455), 2039 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 3455 transitions. [2021-08-06 20:08:01,559 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 3455 transitions. Word has length 35 [2021-08-06 20:08:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:01,560 INFO L470 AbstractCegarLoop]: Abstraction has 2040 states and 3455 transitions. [2021-08-06 20:08:01,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 3455 transitions. [2021-08-06 20:08:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:01,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:01,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:01,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:01,781 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 [2021-08-06 20:08:01,781 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1095221738, now seen corresponding path program 39 times [2021-08-06 20:08:01,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:01,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669380014] [2021-08-06 20:08:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:01,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:01,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:01,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:01,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:08:01,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:08:01,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:08:01,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:08:01,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:08:01,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:08:01,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:08:01,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:08:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:08:01,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:01,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669380014] [2021-08-06 20:08:01,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669380014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:01,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924940879] [2021-08-06 20:08:01,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:08:01,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:01,969 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) [2021-08-06 20:08:02,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:08:03,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:08:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:08:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:03,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-08-06 20:08:03,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:03,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-08-06 20:08:04,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:04,590 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 68 [2021-08-06 20:08:04,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:04,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2021-08-06 20:08:04,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:08:04,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:08:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:04,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924940879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:04,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:04,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 20:08:04,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136384966] [2021-08-06 20:08:04,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:08:04,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:08:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:08:04,764 INFO L87 Difference]: Start difference. First operand 2040 states and 3455 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-08-06 20:08:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:08,190 INFO L93 Difference]: Finished difference Result 2793 states and 4890 transitions. [2021-08-06 20:08:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:08:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 35 [2021-08-06 20:08:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:08,194 INFO L225 Difference]: With dead ends: 2793 [2021-08-06 20:08:08,194 INFO L226 Difference]: Without dead ends: 2770 [2021-08-06 20:08:08,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1599.1ms TimeCoverageRelationStatistics Valid=137, Invalid=854, Unknown=1, NotChecked=0, Total=992 [2021-08-06 20:08:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-08-06 20:08:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2047. [2021-08-06 20:08:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 1.6974584555229717) internal successors, (3473), 2046 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 3473 transitions. [2021-08-06 20:08:08,213 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 3473 transitions. Word has length 35 [2021-08-06 20:08:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:08,213 INFO L470 AbstractCegarLoop]: Abstraction has 2047 states and 3473 transitions. [2021-08-06 20:08:08,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-08-06 20:08:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 3473 transitions. [2021-08-06 20:08:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:08,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:08,216 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:08,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 20:08:08,433 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 [2021-08-06 20:08:08,433 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2012126512, now seen corresponding path program 40 times [2021-08-06 20:08:08,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:08,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457747246] [2021-08-06 20:08:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:08,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:08,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:08,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:08,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:08:08,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:08:08,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:08:08,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.9 percent of original size [2021-08-06 20:08:08,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:08:08,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:08:08,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:08:08,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:08:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:08:08,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:08,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457747246] [2021-08-06 20:08:08,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457747246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:08,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521572212] [2021-08-06 20:08:08,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:08:08,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:08,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:08,593 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) [2021-08-06 20:08:08,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:08:09,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:08:09,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:09,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:08:09,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:09,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:08:10,326 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-06 20:08:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 42 [2021-08-06 20:08:10,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:10,678 INFO L388 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 31 treesize of output 26 [2021-08-06 20:08:10,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:10,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:08:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:10,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521572212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:10,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:10,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:08:10,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599249695] [2021-08-06 20:08:10,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:08:10,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:08:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:08:10,734 INFO L87 Difference]: Start difference. First operand 2047 states and 3473 transitions. Second operand has 18 states, 18 states have (on average 3.0) 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) [2021-08-06 20:08:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:12,782 INFO L93 Difference]: Finished difference Result 2652 states and 4526 transitions. [2021-08-06 20:08:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:08:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) 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 35 [2021-08-06 20:08:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:12,785 INFO L225 Difference]: With dead ends: 2652 [2021-08-06 20:08:12,786 INFO L226 Difference]: Without dead ends: 2614 [2021-08-06 20:08:12,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 535.1ms TimeCoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2021-08-06 20:08:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-08-06 20:08:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2040. [2021-08-06 20:08:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2039 states have (on average 1.6944580676802354) internal successors, (3455), 2039 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 3455 transitions. [2021-08-06 20:08:12,805 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 3455 transitions. Word has length 35 [2021-08-06 20:08:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:12,805 INFO L470 AbstractCegarLoop]: Abstraction has 2040 states and 3455 transitions. [2021-08-06 20:08:12,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) 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) [2021-08-06 20:08:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 3455 transitions. [2021-08-06 20:08:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:12,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:12,807 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:12,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 20:08:13,020 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 [2021-08-06 20:08:13,021 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -744011194, now seen corresponding path program 41 times [2021-08-06 20:08:13,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:13,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126316693] [2021-08-06 20:08:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:13,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:13,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:13,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:13,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:13,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:13,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:13,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:13,067 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:13,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:13,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:13,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:13,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:13,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126316693] [2021-08-06 20:08:13,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126316693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:13,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478405816] [2021-08-06 20:08:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:08:13,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:13,165 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) [2021-08-06 20:08:13,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:08:14,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:08:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:08:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:14,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:08:14,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:14,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-08-06 20:08:14,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:14,723 INFO L388 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 35 treesize of output 28 [2021-08-06 20:08:14,726 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:08:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:08:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:14,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478405816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:14,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:14,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-06 20:08:14,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124528750] [2021-08-06 20:08:14,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:08:14,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:08:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:08:14,767 INFO L87 Difference]: Start difference. First operand 2040 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:08:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:15,900 INFO L93 Difference]: Finished difference Result 2336 states and 4036 transitions. [2021-08-06 20:08:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 35 [2021-08-06 20:08:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:15,902 INFO L225 Difference]: With dead ends: 2336 [2021-08-06 20:08:15,902 INFO L226 Difference]: Without dead ends: 2331 [2021-08-06 20:08:15,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:08:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-06 20:08:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2064. [2021-08-06 20:08:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 1.6970431410567135) internal successors, (3501), 2063 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3501 transitions. [2021-08-06 20:08:15,920 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3501 transitions. Word has length 35 [2021-08-06 20:08:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:15,920 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 3501 transitions. [2021-08-06 20:08:15,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-08-06 20:08:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3501 transitions. [2021-08-06 20:08:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:15,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:15,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:15,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:16,142 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 [2021-08-06 20:08:16,142 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash 75347530, now seen corresponding path program 42 times [2021-08-06 20:08:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:16,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909730429] [2021-08-06 20:08:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:16,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:16,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:16,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:16,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:16,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:16,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:16,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:16,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:16,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:16,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:16,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:16,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:16,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:16,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:16,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909730429] [2021-08-06 20:08:16,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909730429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:16,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457819572] [2021-08-06 20:08:16,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:08:16,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:16,293 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) [2021-08-06 20:08:16,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:08:17,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:08:17,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:08:17,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:08:17,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:17,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:08:18,369 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:08:18,369 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:08:18,372 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:08:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:08:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:18,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457819572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:18,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:18,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:08:18,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613974919] [2021-08-06 20:08:18,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:08:18,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:08:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=204, Unknown=1, NotChecked=0, Total=240 [2021-08-06 20:08:18,407 INFO L87 Difference]: Start difference. First operand 2064 states and 3501 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:22,227 INFO L93 Difference]: Finished difference Result 2336 states and 4037 transitions. [2021-08-06 20:08:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:22,230 INFO L225 Difference]: With dead ends: 2336 [2021-08-06 20:08:22,230 INFO L226 Difference]: Without dead ends: 2331 [2021-08-06 20:08:22,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=43, Invalid=262, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:08:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-06 20:08:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2058. [2021-08-06 20:08:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 1.6932425862907146) internal successors, (3483), 2057 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3483 transitions. [2021-08-06 20:08:22,247 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3483 transitions. Word has length 35 [2021-08-06 20:08:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:22,247 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 3483 transitions. [2021-08-06 20:08:22,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3483 transitions. [2021-08-06 20:08:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:22,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:22,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:22,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:22,452 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 [2021-08-06 20:08:22,452 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1050814138, now seen corresponding path program 43 times [2021-08-06 20:08:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:22,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612202617] [2021-08-06 20:08:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:22,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:22,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:22,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:22,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:22,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:22,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:22,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:22,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:22,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.0 percent of original size [2021-08-06 20:08:22,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:22,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 20:08:22,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:08:22,577 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:08:22,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:22,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:22,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:22,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612202617] [2021-08-06 20:08:22,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612202617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:22,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467418894] [2021-08-06 20:08:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:08:22,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:22,649 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) [2021-08-06 20:08:22,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:08:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:08:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:08:24,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:24,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:08:25,675 INFO L354 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2021-08-06 20:08:25,676 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 42 [2021-08-06 20:08:25,679 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 20:08:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-08-06 20:08:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:25,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467418894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:25,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:25,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:08:25,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215689705] [2021-08-06 20:08:25,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:08:25,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:08:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=201, Unknown=3, NotChecked=0, Total=240 [2021-08-06 20:08:25,714 INFO L87 Difference]: Start difference. First operand 2058 states and 3483 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:25,905 INFO L93 Difference]: Finished difference Result 2328 states and 4020 transitions. [2021-08-06 20:08:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:08:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:25,908 INFO L225 Difference]: With dead ends: 2328 [2021-08-06 20:08:25,908 INFO L226 Difference]: Without dead ends: 2323 [2021-08-06 20:08:25,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1429.0ms TimeCoverageRelationStatistics Valid=40, Invalid=229, Unknown=3, NotChecked=0, Total=272 [2021-08-06 20:08:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-08-06 20:08:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2060. [2021-08-06 20:08:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 1.694026226323458) internal successors, (3488), 2059 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3488 transitions. [2021-08-06 20:08:25,925 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3488 transitions. Word has length 35 [2021-08-06 20:08:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3488 transitions. [2021-08-06 20:08:25,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3488 transitions. [2021-08-06 20:08:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:25,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:25,928 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:25,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:26,147 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 [2021-08-06 20:08:26,147 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:26,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1656381062, now seen corresponding path program 44 times [2021-08-06 20:08:26,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:26,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518991054] [2021-08-06 20:08:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:26,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:26,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:26,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:26,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:26,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:26,188 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:26,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:26,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:26,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518991054] [2021-08-06 20:08:26,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518991054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:26,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785391253] [2021-08-06 20:08:26,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:08:26,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:26,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:26,291 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) [2021-08-06 20:08:26,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:08:27,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:08:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:08:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:08:27,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:27,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-08-06 20:08:28,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:28,031 INFO L388 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 35 treesize of output 28 [2021-08-06 20:08:28,035 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:08:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:08:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785391253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:28,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:28,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:08:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435322152] [2021-08-06 20:08:28,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:08:28,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:08:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:08:28,089 INFO L87 Difference]: Start difference. First operand 2060 states and 3488 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-08-06 20:08:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:28,291 INFO L93 Difference]: Finished difference Result 2340 states and 4047 transitions. [2021-08-06 20:08:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 35 [2021-08-06 20:08:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:28,294 INFO L225 Difference]: With dead ends: 2340 [2021-08-06 20:08:28,294 INFO L226 Difference]: Without dead ends: 2335 [2021-08-06 20:08:28,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:08:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-06 20:08:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2076. [2021-08-06 20:08:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 1.6983132530120482) internal successors, (3524), 2075 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3524 transitions. [2021-08-06 20:08:28,328 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3524 transitions. Word has length 35 [2021-08-06 20:08:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:28,339 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 3524 transitions. [2021-08-06 20:08:28,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-08-06 20:08:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3524 transitions. [2021-08-06 20:08:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:28,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:28,342 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:28,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:28,560 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 [2021-08-06 20:08:28,561 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1819227510, now seen corresponding path program 45 times [2021-08-06 20:08:28,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:28,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717514045] [2021-08-06 20:08:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:28,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:28,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:28,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:28,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:28,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:28,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:28,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:28,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:28,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:28,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:28,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717514045] [2021-08-06 20:08:28,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717514045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:28,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278012794] [2021-08-06 20:08:28,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:08:28,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:28,728 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) [2021-08-06 20:08:28,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:08:30,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:08:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:30,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:08:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:08:30,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:30,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:08:31,387 INFO L354 Elim1Store]: treesize reduction 35, result has 40.7 percent of original size [2021-08-06 20:08:31,387 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2021-08-06 20:08:31,390 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:08:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2021-08-06 20:08:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:31,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278012794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:31,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:31,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:08:31,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621531357] [2021-08-06 20:08:31,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:08:31,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:08:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=231, Unknown=2, NotChecked=0, Total=272 [2021-08-06 20:08:31,425 INFO L87 Difference]: Start difference. First operand 2076 states and 3524 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:08:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:32,160 INFO L93 Difference]: Finished difference Result 2340 states and 4048 transitions. [2021-08-06 20:08:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:32,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 35 [2021-08-06 20:08:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:32,163 INFO L225 Difference]: With dead ends: 2340 [2021-08-06 20:08:32,163 INFO L226 Difference]: Without dead ends: 2335 [2021-08-06 20:08:32,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1402.7ms TimeCoverageRelationStatistics Valid=58, Invalid=359, Unknown=3, NotChecked=0, Total=420 [2021-08-06 20:08:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-06 20:08:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2070. [2021-08-06 20:08:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.694538424359594) internal successors, (3506), 2069 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3506 transitions. [2021-08-06 20:08:32,182 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3506 transitions. Word has length 35 [2021-08-06 20:08:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:32,182 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3506 transitions. [2021-08-06 20:08:32,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:08:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3506 transitions. [2021-08-06 20:08:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:32,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:32,184 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:32,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:32,400 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 [2021-08-06 20:08:32,401 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1349578118, now seen corresponding path program 46 times [2021-08-06 20:08:32,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:32,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944249622] [2021-08-06 20:08:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:32,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:32,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:32,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:32,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:32,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:32,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:32,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:32,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:08:32,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:08:32,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:32,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:08:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:32,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:32,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944249622] [2021-08-06 20:08:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944249622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:32,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838124425] [2021-08-06 20:08:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:08:32,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:32,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:32,602 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) [2021-08-06 20:08:32,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:08:33,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:08:33,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:08:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:08:34,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:34,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:08:35,755 INFO L354 Elim1Store]: treesize reduction 35, result has 40.7 percent of original size [2021-08-06 20:08:35,756 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2021-08-06 20:08:35,759 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:08:35,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2021-08-06 20:08:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:35,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838124425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:35,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:35,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:08:35,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991731157] [2021-08-06 20:08:35,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:08:35,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:08:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=229, Unknown=3, NotChecked=0, Total=272 [2021-08-06 20:08:35,794 INFO L87 Difference]: Start difference. First operand 2070 states and 3506 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:08:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:39,914 INFO L93 Difference]: Finished difference Result 2332 states and 4031 transitions. [2021-08-06 20:08:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:08:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 35 [2021-08-06 20:08:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:39,917 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 20:08:39,917 INFO L226 Difference]: Without dead ends: 2327 [2021-08-06 20:08:39,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1452.9ms TimeCoverageRelationStatistics Valid=55, Invalid=322, Unknown=3, NotChecked=0, Total=380 [2021-08-06 20:08:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-08-06 20:08:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2068. [2021-08-06 20:08:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 1.6932752781809386) internal successors, (3500), 2067 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 3500 transitions. [2021-08-06 20:08:39,948 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 3500 transitions. Word has length 35 [2021-08-06 20:08:39,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:39,949 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 3500 transitions. [2021-08-06 20:08:39,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:08:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 3500 transitions. [2021-08-06 20:08:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:08:39,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:39,951 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:39,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:40,171 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 [2021-08-06 20:08:40,171 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:08:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1052831188, now seen corresponding path program 47 times [2021-08-06 20:08:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:40,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936987451] [2021-08-06 20:08:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:40,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:40,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:40,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:08:40,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:40,222 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:08:40,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:40,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:08:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:40,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:40,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936987451] [2021-08-06 20:08:40,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936987451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:40,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105206090] [2021-08-06 20:08:40,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:08:40,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:40,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:40,393 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) [2021-08-06 20:08:40,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:08:41,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:08:41,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:08:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:08:42,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:42,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-08-06 20:08:50,156 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:08:50,157 INFO L388 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 35 [2021-08-06 20:08:50,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:08:50,163 INFO L388 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 23 treesize of output 22 [2021-08-06 20:08:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:50,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105206090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:50,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:50,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:08:50,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731773002] [2021-08-06 20:08:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:08:50,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:08:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=326, Unknown=9, NotChecked=0, Total=380 [2021-08-06 20:08:50,204 INFO L87 Difference]: Start difference. First operand 2068 states and 3500 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:07,221 INFO L93 Difference]: Finished difference Result 2442 states and 4195 transitions. [2021-08-06 20:09:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:09:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:09:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:07,224 INFO L225 Difference]: With dead ends: 2442 [2021-08-06 20:09:07,225 INFO L226 Difference]: Without dead ends: 2418 [2021-08-06 20:09:07,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 9851.8ms TimeCoverageRelationStatistics Valid=73, Invalid=566, Unknown=11, NotChecked=0, Total=650 [2021-08-06 20:09:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-08-06 20:09:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2145. [2021-08-06 20:09:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 1.7061567164179106) internal successors, (3658), 2144 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3658 transitions. [2021-08-06 20:09:07,267 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3658 transitions. Word has length 35 [2021-08-06 20:09:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:07,267 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 3658 transitions. [2021-08-06 20:09:07,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3658 transitions. [2021-08-06 20:09:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:07,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:07,269 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:07,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:07,469 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 [2021-08-06 20:09:07,470 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash -233472464, now seen corresponding path program 48 times [2021-08-06 20:09:07,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:07,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153741086] [2021-08-06 20:09:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:07,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:07,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:07,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:07,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:07,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:07,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:07,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:07,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:07,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:07,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:07,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153741086] [2021-08-06 20:09:07,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153741086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:07,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249159847] [2021-08-06 20:09:07,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:09:07,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:07,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:07,645 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) [2021-08-06 20:09:07,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:09:09,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:09:09,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:09:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:09:09,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:09:10,027 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:09:10,027 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:09:10,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:09:10,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:09:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:10,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249159847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:10,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:10,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:09:10,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878445587] [2021-08-06 20:09:10,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:09:10,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:09:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2021-08-06 20:09:10,068 INFO L87 Difference]: Start difference. First operand 2145 states and 3658 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:13,765 INFO L93 Difference]: Finished difference Result 2350 states and 4033 transitions. [2021-08-06 20:09:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:09:13,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 35 [2021-08-06 20:09:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:13,768 INFO L225 Difference]: With dead ends: 2350 [2021-08-06 20:09:13,768 INFO L226 Difference]: Without dead ends: 2336 [2021-08-06 20:09:13,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 973.4ms TimeCoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2021-08-06 20:09:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-08-06 20:09:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2151. [2021-08-06 20:09:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 1.7083720930232558) internal successors, (3673), 2150 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3673 transitions. [2021-08-06 20:09:13,785 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3673 transitions. Word has length 35 [2021-08-06 20:09:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:13,785 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 3673 transitions. [2021-08-06 20:09:13,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3673 transitions. [2021-08-06 20:09:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:13,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:13,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:13,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:14,008 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 [2021-08-06 20:09:14,009 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1573469830, now seen corresponding path program 49 times [2021-08-06 20:09:14,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:14,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359917762] [2021-08-06 20:09:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:14,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:14,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:14,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:14,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:14,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:14,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:14,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:14,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:14,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359917762] [2021-08-06 20:09:14,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359917762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:14,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117626510] [2021-08-06 20:09:14,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:09:14,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:14,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:14,183 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) [2021-08-06 20:09:14,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:09:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:09:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:09:15,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:15,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-08-06 20:09:15,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:15,993 INFO L388 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 35 treesize of output 28 [2021-08-06 20:09:15,996 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:09:15,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:09:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:16,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117626510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:16,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:16,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:09:16,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48825087] [2021-08-06 20:09:16,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:09:16,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:09:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:09:16,030 INFO L87 Difference]: Start difference. First operand 2151 states and 3673 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) [2021-08-06 20:09:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:16,205 INFO L93 Difference]: Finished difference Result 2556 states and 4494 transitions. [2021-08-06 20:09:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:09:16,205 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 35 [2021-08-06 20:09:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:16,208 INFO L225 Difference]: With dead ends: 2556 [2021-08-06 20:09:16,208 INFO L226 Difference]: Without dead ends: 2547 [2021-08-06 20:09:16,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:09:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-08-06 20:09:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2170. [2021-08-06 20:09:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.714153988012909) internal successors, (3718), 2169 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3718 transitions. [2021-08-06 20:09:16,227 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3718 transitions. Word has length 35 [2021-08-06 20:09:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:16,227 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3718 transitions. [2021-08-06 20:09:16,227 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) [2021-08-06 20:09:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3718 transitions. [2021-08-06 20:09:16,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:16,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:16,230 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:16,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:16,448 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 [2021-08-06 20:09:16,449 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1620003386, now seen corresponding path program 50 times [2021-08-06 20:09:16,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:16,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719319031] [2021-08-06 20:09:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:16,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:16,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:16,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:16,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:16,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:16,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:16,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:16,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:16,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719319031] [2021-08-06 20:09:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719319031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:16,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420398736] [2021-08-06 20:09:16,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:09:16,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:16,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:16,592 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) [2021-08-06 20:09:16,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:09:18,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:09:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:09:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:18,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:09:18,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-08-06 20:09:18,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:18,755 INFO L388 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 35 treesize of output 28 [2021-08-06 20:09:18,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:09:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:09:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:18,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420398736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:18,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:18,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:09:18,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734846279] [2021-08-06 20:09:18,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:09:18,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:09:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-08-06 20:09:18,802 INFO L87 Difference]: Start difference. First operand 2170 states and 3718 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:19,042 INFO L93 Difference]: Finished difference Result 2941 states and 5168 transitions. [2021-08-06 20:09:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:09:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 35 [2021-08-06 20:09:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:19,046 INFO L225 Difference]: With dead ends: 2941 [2021-08-06 20:09:19,046 INFO L226 Difference]: Without dead ends: 2927 [2021-08-06 20:09:19,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:09:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-08-06 20:09:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2197. [2021-08-06 20:09:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2196 states have (on average 1.7240437158469946) internal successors, (3786), 2196 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3786 transitions. [2021-08-06 20:09:19,066 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3786 transitions. Word has length 35 [2021-08-06 20:09:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 2197 states and 3786 transitions. [2021-08-06 20:09:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3786 transitions. [2021-08-06 20:09:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:19,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:19,068 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:19,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:19,288 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 [2021-08-06 20:09:19,288 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash 882018822, now seen corresponding path program 51 times [2021-08-06 20:09:19,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:19,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78556961] [2021-08-06 20:09:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:19,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:19,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:19,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:19,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:19,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:19,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:19,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:19,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78556961] [2021-08-06 20:09:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78556961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:19,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842483293] [2021-08-06 20:09:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:09:19,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:19,443 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) [2021-08-06 20:09:19,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:09:20,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:09:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:09:20,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:21,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:09:21,271 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-06 20:09:21,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2021-08-06 20:09:21,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:21,907 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 65 [2021-08-06 20:09:21,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:21,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2021-08-06 20:09:21,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:09:21,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:09:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842483293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:22,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:22,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 20:09:22,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455873409] [2021-08-06 20:09:22,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:09:22,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:09:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=265, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:09:22,028 INFO L87 Difference]: Start difference. First operand 2197 states and 3786 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:09:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:23,547 INFO L93 Difference]: Finished difference Result 3345 states and 5807 transitions. [2021-08-06 20:09:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:09:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 35 [2021-08-06 20:09:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:23,551 INFO L225 Difference]: With dead ends: 3345 [2021-08-06 20:09:23,551 INFO L226 Difference]: Without dead ends: 3326 [2021-08-06 20:09:23,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 850.6ms TimeCoverageRelationStatistics Valid=98, Invalid=657, Unknown=1, NotChecked=0, Total=756 [2021-08-06 20:09:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-08-06 20:09:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2174. [2021-08-06 20:09:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 1.7082374597330878) internal successors, (3712), 2173 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3712 transitions. [2021-08-06 20:09:23,598 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3712 transitions. Word has length 35 [2021-08-06 20:09:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:23,598 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 3712 transitions. [2021-08-06 20:09:23,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:09:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3712 transitions. [2021-08-06 20:09:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:23,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:23,600 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:23,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:23,812 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 [2021-08-06 20:09:23,813 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1300656582, now seen corresponding path program 52 times [2021-08-06 20:09:23,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:23,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509971459] [2021-08-06 20:09:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:23,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:23,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:23,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:23,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:23,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:23,855 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:23,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:23,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:23,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:23,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:09:23,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:09:23,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:09:23,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:09:23,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:23,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:24,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:24,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509971459] [2021-08-06 20:09:24,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509971459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:24,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047026913] [2021-08-06 20:09:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:09:24,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:24,022 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) [2021-08-06 20:09:24,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:09:25,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:09:25,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:09:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:26,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:09:27,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:27,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:09:28,547 INFO L354 Elim1Store]: treesize reduction 35, result has 40.7 percent of original size [2021-08-06 20:09:28,547 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 41 [2021-08-06 20:09:28,550 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 20:09:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 16 [2021-08-06 20:09:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:28,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047026913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:28,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:28,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:09:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719615839] [2021-08-06 20:09:28,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:09:28,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:09:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=223, Unknown=6, NotChecked=0, Total=272 [2021-08-06 20:09:28,585 INFO L87 Difference]: Start difference. First operand 2174 states and 3712 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:38,749 INFO L93 Difference]: Finished difference Result 2593 states and 4516 transitions. [2021-08-06 20:09:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:09:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 35 [2021-08-06 20:09:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:38,752 INFO L225 Difference]: With dead ends: 2593 [2021-08-06 20:09:38,752 INFO L226 Difference]: Without dead ends: 2569 [2021-08-06 20:09:38,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2554.7ms TimeCoverageRelationStatistics Valid=53, Invalid=283, Unknown=6, NotChecked=0, Total=342 [2021-08-06 20:09:38,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-06 20:09:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2214. [2021-08-06 20:09:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 1.7067329417080885) internal successors, (3777), 2213 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 3777 transitions. [2021-08-06 20:09:38,771 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 3777 transitions. Word has length 35 [2021-08-06 20:09:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:38,771 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 3777 transitions. [2021-08-06 20:09:38,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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) [2021-08-06 20:09:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 3777 transitions. [2021-08-06 20:09:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:38,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:38,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:38,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:38,976 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 [2021-08-06 20:09:38,977 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2127385030, now seen corresponding path program 53 times [2021-08-06 20:09:38,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:38,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241438549] [2021-08-06 20:09:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:38,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:38,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:38,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:39,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:39,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:39,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:39,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:39,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:39,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:39,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:09:39,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:09:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:39,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:39,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241438549] [2021-08-06 20:09:39,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241438549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:39,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661451733] [2021-08-06 20:09:39,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:09:39,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:39,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:39,121 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) [2021-08-06 20:09:39,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:09:40,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:09:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:09:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:40,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-08-06 20:09:41,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-08-06 20:09:42,220 INFO L354 Elim1Store]: treesize reduction 27, result has 44.9 percent of original size [2021-08-06 20:09:42,220 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-08-06 20:09:42,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2021-08-06 20:09:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:42,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661451733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:42,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:42,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:09:42,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867192760] [2021-08-06 20:09:42,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:09:42,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:09:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:09:42,266 INFO L87 Difference]: Start difference. First operand 2214 states and 3777 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:44,764 INFO L93 Difference]: Finished difference Result 2708 states and 4720 transitions. [2021-08-06 20:09:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:09:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:09:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:44,768 INFO L225 Difference]: With dead ends: 2708 [2021-08-06 20:09:44,768 INFO L226 Difference]: Without dead ends: 2694 [2021-08-06 20:09:44,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1044.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:09:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-08-06 20:09:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2223. [2021-08-06 20:09:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.711971197119712) internal successors, (3804), 2222 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3804 transitions. [2021-08-06 20:09:44,789 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3804 transitions. Word has length 35 [2021-08-06 20:09:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:44,789 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3804 transitions. [2021-08-06 20:09:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3804 transitions. [2021-08-06 20:09:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:44,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:44,791 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:44,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 20:09:45,012 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 [2021-08-06 20:09:45,013 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash 912890118, now seen corresponding path program 54 times [2021-08-06 20:09:45,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:45,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250074594] [2021-08-06 20:09:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:45,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:45,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:45,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:45,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:45,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 86.0 percent of original size [2021-08-06 20:09:45,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:45,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 20:09:45,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:45,097 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:09:45,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:09:45,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:09:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:45,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:45,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250074594] [2021-08-06 20:09:45,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250074594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:45,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846467744] [2021-08-06 20:09:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:09:45,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:45,174 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) [2021-08-06 20:09:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:09:46,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:09:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:09:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:09:47,312 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:09:47,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2021-08-06 20:09:47,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:47,822 INFO L388 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 31 treesize of output 26 [2021-08-06 20:09:47,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:47,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:09:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846467744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:47,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:09:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123675378] [2021-08-06 20:09:47,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:09:47,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:09:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:09:47,880 INFO L87 Difference]: Start difference. First operand 2223 states and 3804 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:48,240 INFO L93 Difference]: Finished difference Result 2847 states and 4865 transitions. [2021-08-06 20:09:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:09:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:09:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:48,243 INFO L225 Difference]: With dead ends: 2847 [2021-08-06 20:09:48,244 INFO L226 Difference]: Without dead ends: 2837 [2021-08-06 20:09:48,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:09:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2837 states. [2021-08-06 20:09:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2837 to 2214. [2021-08-06 20:09:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 1.7067329417080885) internal successors, (3777), 2213 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 3777 transitions. [2021-08-06 20:09:48,296 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 3777 transitions. Word has length 35 [2021-08-06 20:09:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 3777 transitions. [2021-08-06 20:09:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 3777 transitions. [2021-08-06 20:09:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:48,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:48,299 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:48,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:48,519 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 [2021-08-06 20:09:48,520 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1302942406, now seen corresponding path program 55 times [2021-08-06 20:09:48,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:48,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500960215] [2021-08-06 20:09:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:48,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:48,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:48,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:48,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500960215] [2021-08-06 20:09:48,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500960215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167643941] [2021-08-06 20:09:48,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:09:48,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:48,717 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) [2021-08-06 20:09:48,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:09:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:09:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:09:50,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-06 20:09:50,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:50,804 INFO L388 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 35 treesize of output 28 [2021-08-06 20:09:50,807 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:09:50,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:09:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:50,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167643941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:50,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:50,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:09:50,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95087538] [2021-08-06 20:09:50,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:09:50,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:09:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:09:50,857 INFO L87 Difference]: Start difference. First operand 2214 states and 3777 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:51,034 INFO L93 Difference]: Finished difference Result 2500 states and 4342 transitions. [2021-08-06 20:09:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:09:51,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:09:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:51,037 INFO L225 Difference]: With dead ends: 2500 [2021-08-06 20:09:51,037 INFO L226 Difference]: Without dead ends: 2495 [2021-08-06 20:09:51,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:09:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-06 20:09:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2236. [2021-08-06 20:09:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 1.708724832214765) internal successors, (3819), 2235 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 3819 transitions. [2021-08-06 20:09:51,055 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 3819 transitions. Word has length 35 [2021-08-06 20:09:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:51,055 INFO L470 AbstractCegarLoop]: Abstraction has 2236 states and 3819 transitions. [2021-08-06 20:09:51,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 3819 transitions. [2021-08-06 20:09:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:51,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:51,057 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:51,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:51,272 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 [2021-08-06 20:09:51,273 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2122301130, now seen corresponding path program 56 times [2021-08-06 20:09:51,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:51,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069447413] [2021-08-06 20:09:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:51,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:51,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:51,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:51,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:51,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:51,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:51,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069447413] [2021-08-06 20:09:51,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069447413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:51,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845825613] [2021-08-06 20:09:51,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:09:51,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:51,425 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) [2021-08-06 20:09:51,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:09:53,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:09:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:09:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-08-06 20:09:54,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:09:54,906 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:09:54,907 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:09:54,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:09:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:09:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:54,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845825613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:54,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:54,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:09:54,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661460816] [2021-08-06 20:09:54,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:09:54,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:09:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=293, Unknown=2, NotChecked=0, Total=342 [2021-08-06 20:09:54,946 INFO L87 Difference]: Start difference. First operand 2236 states and 3819 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:09:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:09:55,605 INFO L93 Difference]: Finished difference Result 2608 states and 4551 transitions. [2021-08-06 20:09:55,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:09:55,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 35 [2021-08-06 20:09:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:09:55,608 INFO L225 Difference]: With dead ends: 2608 [2021-08-06 20:09:55,608 INFO L226 Difference]: Without dead ends: 2603 [2021-08-06 20:09:55,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1490.0ms TimeCoverageRelationStatistics Valid=66, Invalid=438, Unknown=2, NotChecked=0, Total=506 [2021-08-06 20:09:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-08-06 20:09:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2230. [2021-08-06 20:09:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 1.705248990578735) internal successors, (3801), 2229 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:09:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 3801 transitions. [2021-08-06 20:09:55,626 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 3801 transitions. Word has length 35 [2021-08-06 20:09:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:09:55,626 INFO L470 AbstractCegarLoop]: Abstraction has 2230 states and 3801 transitions. [2021-08-06 20:09:55,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:09:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 3801 transitions. [2021-08-06 20:09:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:09:55,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:09:55,628 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:09:55,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:09:55,849 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 [2021-08-06 20:09:55,850 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:09:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:09:55,850 INFO L82 PathProgramCache]: Analyzing trace with hash 996139462, now seen corresponding path program 57 times [2021-08-06 20:09:55,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:09:55,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801512738] [2021-08-06 20:09:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:09:55,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:09:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:09:55,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:55,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:09:55,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:09:55,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:09:55,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:55,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:09:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:56,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:09:56,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801512738] [2021-08-06 20:09:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801512738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:56,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97264875] [2021-08-06 20:09:56,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:09:56,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:09:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:09:56,061 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) [2021-08-06 20:09:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:09:57,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:09:57,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:09:57,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:09:57,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:09:58,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:09:58,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-08-06 20:09:58,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:09:58,739 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-08-06 20:09:58,749 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-06 20:09:58,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 49 [2021-08-06 20:09:58,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:09:58,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:09:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:09:58,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97264875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:09:58,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:09:58,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:09:58,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014406062] [2021-08-06 20:09:58,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:09:58,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:09:58,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:09:58,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=326, Unknown=1, NotChecked=0, Total=380 [2021-08-06 20:09:58,850 INFO L87 Difference]: Start difference. First operand 2230 states and 3801 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:03,308 INFO L93 Difference]: Finished difference Result 2648 states and 4654 transitions. [2021-08-06 20:10:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:10:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:10:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:03,312 INFO L225 Difference]: With dead ends: 2648 [2021-08-06 20:10:03,312 INFO L226 Difference]: Without dead ends: 2643 [2021-08-06 20:10:03,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1612.3ms TimeCoverageRelationStatistics Valid=106, Invalid=703, Unknown=3, NotChecked=0, Total=812 [2021-08-06 20:10:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-08-06 20:10:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2222. [2021-08-06 20:10:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 1.7059882935614588) internal successors, (3789), 2221 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3789 transitions. [2021-08-06 20:10:03,331 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3789 transitions. Word has length 35 [2021-08-06 20:10:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:03,331 INFO L470 AbstractCegarLoop]: Abstraction has 2222 states and 3789 transitions. [2021-08-06 20:10:03,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3789 transitions. [2021-08-06 20:10:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:03,333 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:03,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:03,555 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 [2021-08-06 20:10:03,555 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:03,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1406269844, now seen corresponding path program 58 times [2021-08-06 20:10:03,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:03,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466210370] [2021-08-06 20:10:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:03,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:03,570 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:03,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:03,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:03,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466210370] [2021-08-06 20:10:03,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466210370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:03,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636091005] [2021-08-06 20:10:03,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:03,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:03,725 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) [2021-08-06 20:10:03,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:10:05,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:10:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:10:05,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:05,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-06 20:10:05,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:05,948 INFO L388 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 35 treesize of output 28 [2021-08-06 20:10:05,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:10:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:10:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:05,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636091005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:05,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:05,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:10:05,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874352453] [2021-08-06 20:10:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:10:05,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:10:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:10:05,993 INFO L87 Difference]: Start difference. First operand 2222 states and 3789 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:06,203 INFO L93 Difference]: Finished difference Result 2608 states and 4517 transitions. [2021-08-06 20:10:06,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:10:06,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:10:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:06,206 INFO L225 Difference]: With dead ends: 2608 [2021-08-06 20:10:06,206 INFO L226 Difference]: Without dead ends: 2584 [2021-08-06 20:10:06,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:10:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-08-06 20:10:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2268. [2021-08-06 20:10:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 1.709748566387296) internal successors, (3876), 2267 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 3876 transitions. [2021-08-06 20:10:06,225 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 3876 transitions. Word has length 35 [2021-08-06 20:10:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:06,225 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 3876 transitions. [2021-08-06 20:10:06,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 3876 transitions. [2021-08-06 20:10:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:06,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:06,228 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:06,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:06,438 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 [2021-08-06 20:10:06,439 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash -586911120, now seen corresponding path program 59 times [2021-08-06 20:10:06,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:06,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517129534] [2021-08-06 20:10:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:06,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:06,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:06,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:06,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:06,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:06,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:06,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517129534] [2021-08-06 20:10:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517129534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:06,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887902430] [2021-08-06 20:10:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:06,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:06,653 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) [2021-08-06 20:10:06,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:10:08,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:10:08,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:10:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 20:10:09,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:09,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-08-06 20:10:09,654 INFO L354 Elim1Store]: treesize reduction 27, result has 44.9 percent of original size [2021-08-06 20:10:09,654 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-08-06 20:10:09,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2021-08-06 20:10:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:09,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887902430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:09,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:09,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-06 20:10:09,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389537386] [2021-08-06 20:10:09,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:10:09,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:10:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:10:09,703 INFO L87 Difference]: Start difference. First operand 2268 states and 3876 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:10:11,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:11,877 INFO L93 Difference]: Finished difference Result 2626 states and 4532 transitions. [2021-08-06 20:10:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:10:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 35 [2021-08-06 20:10:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:11,881 INFO L225 Difference]: With dead ends: 2626 [2021-08-06 20:10:11,881 INFO L226 Difference]: Without dead ends: 2609 [2021-08-06 20:10:11,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1202.7ms TimeCoverageRelationStatistics Valid=73, Invalid=432, Unknown=1, NotChecked=0, Total=506 [2021-08-06 20:10:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-08-06 20:10:11,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2262. [2021-08-06 20:10:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2261 states have (on average 1.7063246351172048) internal successors, (3858), 2261 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3858 transitions. [2021-08-06 20:10:11,900 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3858 transitions. Word has length 35 [2021-08-06 20:10:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 2262 states and 3858 transitions. [2021-08-06 20:10:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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) [2021-08-06 20:10:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3858 transitions. [2021-08-06 20:10:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:11,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:11,902 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:11,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:12,123 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 [2021-08-06 20:10:12,123 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1220031174, now seen corresponding path program 60 times [2021-08-06 20:10:12,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:12,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288286763] [2021-08-06 20:10:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:12,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:12,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:12,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:12,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:12,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288286763] [2021-08-06 20:10:12,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288286763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:12,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124559932] [2021-08-06 20:10:12,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:12,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:12,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:12,286 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) [2021-08-06 20:10:12,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:10:14,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:10:14,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:10:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:14,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:10:14,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:14,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-08-06 20:10:14,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:14,523 INFO L388 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 35 treesize of output 28 [2021-08-06 20:10:14,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:10:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:10:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124559932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:14,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:14,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-08-06 20:10:14,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194500083] [2021-08-06 20:10:14,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:10:14,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:10:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:10:14,569 INFO L87 Difference]: Start difference. First operand 2262 states and 3858 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-08-06 20:10:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:15,720 INFO L93 Difference]: Finished difference Result 2669 states and 4681 transitions. [2021-08-06 20:10:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:10:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 35 [2021-08-06 20:10:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:15,723 INFO L225 Difference]: With dead ends: 2669 [2021-08-06 20:10:15,723 INFO L226 Difference]: Without dead ends: 2660 [2021-08-06 20:10:15,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:10:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-08-06 20:10:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2275. [2021-08-06 20:10:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 1.7137203166226913) internal successors, (3897), 2274 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3897 transitions. [2021-08-06 20:10:15,741 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3897 transitions. Word has length 35 [2021-08-06 20:10:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:15,741 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 3897 transitions. [2021-08-06 20:10:15,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-08-06 20:10:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3897 transitions. [2021-08-06 20:10:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:15,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:15,743 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:15,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:15,964 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 [2021-08-06 20:10:15,964 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1973442042, now seen corresponding path program 61 times [2021-08-06 20:10:15,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:15,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242905428] [2021-08-06 20:10:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:15,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:15,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:15,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:16,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242905428] [2021-08-06 20:10:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242905428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766386578] [2021-08-06 20:10:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:10:16,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:16,132 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) [2021-08-06 20:10:16,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:10:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:18,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:10:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:10:18,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:18,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 56 [2021-08-06 20:10:19,051 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-08-06 20:10:19,052 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 37 [2021-08-06 20:10:19,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:10:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:10:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:19,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766386578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:19,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:19,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:10:19,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119486462] [2021-08-06 20:10:19,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:10:19,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:10:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=219, Unknown=1, NotChecked=0, Total=272 [2021-08-06 20:10:19,091 INFO L87 Difference]: Start difference. First operand 2275 states and 3897 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:10:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:19,264 INFO L93 Difference]: Finished difference Result 3017 states and 5271 transitions. [2021-08-06 20:10:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:10:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 35 [2021-08-06 20:10:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:19,268 INFO L225 Difference]: With dead ends: 3017 [2021-08-06 20:10:19,268 INFO L226 Difference]: Without dead ends: 3008 [2021-08-06 20:10:19,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2021-08-06 20:10:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-08-06 20:10:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2294. [2021-08-06 20:10:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 1.7239424334932403) internal successors, (3953), 2293 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 3953 transitions. [2021-08-06 20:10:19,290 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 3953 transitions. Word has length 35 [2021-08-06 20:10:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 3953 transitions. [2021-08-06 20:10:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:10:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 3953 transitions. [2021-08-06 20:10:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:19,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:19,292 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:19,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:19,508 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 [2021-08-06 20:10:19,509 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash 528580166, now seen corresponding path program 62 times [2021-08-06 20:10:19,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:19,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388919619] [2021-08-06 20:10:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:19,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:19,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:19,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:19,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:19,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388919619] [2021-08-06 20:10:19,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388919619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:19,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511669022] [2021-08-06 20:10:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:10:19,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:19,673 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) [2021-08-06 20:10:19,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:10:21,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:10:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:10:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:21,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-06 20:10:22,068 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-06 20:10:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-08-06 20:10:22,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:22,111 INFO L388 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 31 treesize of output 26 [2021-08-06 20:10:22,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:10:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:22,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511669022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:22,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:22,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-08-06 20:10:22,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406462041] [2021-08-06 20:10:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:10:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:10:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:10:22,162 INFO L87 Difference]: Start difference. First operand 2294 states and 3953 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:24,093 INFO L93 Difference]: Finished difference Result 3118 states and 5377 transitions. [2021-08-06 20:10:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:10:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:10:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:24,097 INFO L225 Difference]: With dead ends: 3118 [2021-08-06 20:10:24,097 INFO L226 Difference]: Without dead ends: 3108 [2021-08-06 20:10:24,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:10:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2021-08-06 20:10:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2262. [2021-08-06 20:10:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2261 states have (on average 1.7063246351172048) internal successors, (3858), 2261 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3858 transitions. [2021-08-06 20:10:24,118 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3858 transitions. Word has length 35 [2021-08-06 20:10:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:24,118 INFO L470 AbstractCegarLoop]: Abstraction has 2262 states and 3858 transitions. [2021-08-06 20:10:24,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3858 transitions. [2021-08-06 20:10:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:24,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:24,121 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:24,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 20:10:24,342 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 [2021-08-06 20:10:24,343 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash 947217926, now seen corresponding path program 63 times [2021-08-06 20:10:24,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:24,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076630440] [2021-08-06 20:10:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:24,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:24,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:24,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:24,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:24,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:24,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:24,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:24,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:10:24,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:10:24,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:24,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:24,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:24,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076630440] [2021-08-06 20:10:24,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076630440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:24,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914645136] [2021-08-06 20:10:24,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:10:24,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:24,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:24,586 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) [2021-08-06 20:10:24,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:10:26,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:10:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:10:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:10:28,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:28,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-08-06 20:10:28,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:28,490 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 72 [2021-08-06 20:10:28,500 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-06 20:10:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 49 [2021-08-06 20:10:28,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:10:28,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:10:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:28,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914645136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:28,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:28,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:10:28,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801335610] [2021-08-06 20:10:28,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:10:28,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:10:28,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=322, Unknown=4, NotChecked=0, Total=380 [2021-08-06 20:10:28,600 INFO L87 Difference]: Start difference. First operand 2262 states and 3858 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:37,884 INFO L93 Difference]: Finished difference Result 2790 states and 4895 transitions. [2021-08-06 20:10:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:10:37,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:10:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:37,887 INFO L225 Difference]: With dead ends: 2790 [2021-08-06 20:10:37,887 INFO L226 Difference]: Without dead ends: 2766 [2021-08-06 20:10:37,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3734.6ms TimeCoverageRelationStatistics Valid=109, Invalid=694, Unknown=9, NotChecked=0, Total=812 [2021-08-06 20:10:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-08-06 20:10:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2280. [2021-08-06 20:10:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 1.7095217200526547) internal successors, (3896), 2279 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3896 transitions. [2021-08-06 20:10:37,907 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3896 transitions. Word has length 35 [2021-08-06 20:10:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:37,907 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 3896 transitions. [2021-08-06 20:10:37,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3896 transitions. [2021-08-06 20:10:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:37,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:37,909 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:37,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:38,131 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 [2021-08-06 20:10:38,132 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:38,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1747070508, now seen corresponding path program 64 times [2021-08-06 20:10:38,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:38,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834865101] [2021-08-06 20:10:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:38,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:38,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:38,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:38,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:38,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:38,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:10:38,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:10:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:10:38,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:38,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834865101] [2021-08-06 20:10:38,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834865101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:38,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792855630] [2021-08-06 20:10:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:10:38,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:38,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:38,296 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) [2021-08-06 20:10:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:10:40,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:10:40,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:10:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:10:40,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:40,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:10:42,158 INFO L354 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2021-08-06 20:10:42,158 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 42 [2021-08-06 20:10:42,161 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-06 20:10:42,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-08-06 20:10:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792855630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:42,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:42,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:10:42,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77482295] [2021-08-06 20:10:42,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:10:42,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:10:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=246, Unknown=3, NotChecked=0, Total=306 [2021-08-06 20:10:42,198 INFO L87 Difference]: Start difference. First operand 2280 states and 3896 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:50,065 INFO L93 Difference]: Finished difference Result 2860 states and 5006 transitions. [2021-08-06 20:10:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:10:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:10:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:50,068 INFO L225 Difference]: With dead ends: 2860 [2021-08-06 20:10:50,068 INFO L226 Difference]: Without dead ends: 2855 [2021-08-06 20:10:50,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1448.9ms TimeCoverageRelationStatistics Valid=83, Invalid=376, Unknown=3, NotChecked=0, Total=462 [2021-08-06 20:10:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2021-08-06 20:10:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2287. [2021-08-06 20:10:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 1.7134733158355206) internal successors, (3917), 2286 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3917 transitions. [2021-08-06 20:10:50,087 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3917 transitions. Word has length 35 [2021-08-06 20:10:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3917 transitions. [2021-08-06 20:10:50,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3917 transitions. [2021-08-06 20:10:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:50,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:50,090 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:50,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:50,312 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 [2021-08-06 20:10:50,312 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash 559451462, now seen corresponding path program 65 times [2021-08-06 20:10:50,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:50,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821972990] [2021-08-06 20:10:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:50,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:50,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:50,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:50,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:50,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:50,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:10:50,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:10:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:10:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:50,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821972990] [2021-08-06 20:10:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821972990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:50,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120090529] [2021-08-06 20:10:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:10:50,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:50,491 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) [2021-08-06 20:10:50,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:10:52,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:10:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:10:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:10:52,994 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:10:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2021-08-06 20:10:53,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:53,040 INFO L388 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 31 treesize of output 26 [2021-08-06 20:10:53,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:53,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:10:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120090529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:53,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:10:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:10:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347757406] [2021-08-06 20:10:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:10:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:10:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:10:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:10:53,097 INFO L87 Difference]: Start difference. First operand 2287 states and 3917 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:10:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:10:54,551 INFO L93 Difference]: Finished difference Result 2911 states and 4978 transitions. [2021-08-06 20:10:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:10:54,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 35 [2021-08-06 20:10:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:10:54,554 INFO L225 Difference]: With dead ends: 2911 [2021-08-06 20:10:54,554 INFO L226 Difference]: Without dead ends: 2901 [2021-08-06 20:10:54,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:10:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-08-06 20:10:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2280. [2021-08-06 20:10:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 1.7095217200526547) internal successors, (3896), 2279 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:10:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3896 transitions. [2021-08-06 20:10:54,609 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3896 transitions. Word has length 35 [2021-08-06 20:10:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:10:54,609 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 3896 transitions. [2021-08-06 20:10:54,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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) [2021-08-06 20:10:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3896 transitions. [2021-08-06 20:10:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:10:54,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:10:54,612 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:10:54,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:10:54,826 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 [2021-08-06 20:10:54,826 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:10:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:10:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash -357643706, now seen corresponding path program 66 times [2021-08-06 20:10:54,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:10:54,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844898381] [2021-08-06 20:10:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:10:54,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:10:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:10:54,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:54,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:10:54,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:54,875 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:54,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:10:54,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:10:54,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:54,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:10:54,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:54,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:10:54,956 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:10:54,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 71.7 percent of original size [2021-08-06 20:10:54,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:54,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:10:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:10:55,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:10:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844898381] [2021-08-06 20:10:55,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844898381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:10:55,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051991733] [2021-08-06 20:10:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:10:55,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:10:55,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:10:55,028 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) [2021-08-06 20:10:55,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:10:57,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:10:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:10:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:10:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:10:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-08-06 20:10:59,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:10:59,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-08-06 20:11:00,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:00,180 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 76 [2021-08-06 20:11:00,191 INFO L354 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-08-06 20:11:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 49 [2021-08-06 20:11:00,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:11:00,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:11:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:00,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051991733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:00,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:00,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-06 20:11:00,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212127519] [2021-08-06 20:11:00,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:11:00,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:00,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:11:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=288, Unknown=8, NotChecked=0, Total=342 [2021-08-06 20:11:00,283 INFO L87 Difference]: Start difference. First operand 2280 states and 3896 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:13,372 INFO L93 Difference]: Finished difference Result 2760 states and 4824 transitions. [2021-08-06 20:11:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:11:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:11:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:13,375 INFO L225 Difference]: With dead ends: 2760 [2021-08-06 20:11:13,375 INFO L226 Difference]: Without dead ends: 2736 [2021-08-06 20:11:13,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 6261.1ms TimeCoverageRelationStatistics Valid=103, Invalid=691, Unknown=18, NotChecked=0, Total=812 [2021-08-06 20:11:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-08-06 20:11:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2298. [2021-08-06 20:11:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.7122333478450151) internal successors, (3933), 2297 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3933 transitions. [2021-08-06 20:11:13,394 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3933 transitions. Word has length 35 [2021-08-06 20:11:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:13,394 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 3933 transitions. [2021-08-06 20:11:13,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:13,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3933 transitions. [2021-08-06 20:11:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:11:13,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:13,396 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:13,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:13,612 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 [2021-08-06 20:11:13,613 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash 442208876, now seen corresponding path program 67 times [2021-08-06 20:11:13,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:13,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534907135] [2021-08-06 20:11:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:13,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:13,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:11:13,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:11:13,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:11:13,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:11:13,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:11:13,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:11:13,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:11:13,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:11:13,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:11:13,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:11:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:11:13,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:13,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534907135] [2021-08-06 20:11:13,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534907135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:13,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425433675] [2021-08-06 20:11:13,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:13,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:13,770 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) [2021-08-06 20:11:13,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:11:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:11:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:16,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:11:16,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:16,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 53 [2021-08-06 20:11:18,132 INFO L354 Elim1Store]: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:11:18,133 INFO L388 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-08-06 20:11:18,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 20:11:18,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-08-06 20:11:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:18,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425433675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:18,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:18,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:11:18,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014187809] [2021-08-06 20:11:18,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:11:18,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:11:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=214, Unknown=4, NotChecked=0, Total=272 [2021-08-06 20:11:18,158 INFO L87 Difference]: Start difference. First operand 2298 states and 3933 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:27,343 INFO L93 Difference]: Finished difference Result 2904 states and 5092 transitions. [2021-08-06 20:11:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:11:27,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:11:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:27,347 INFO L225 Difference]: With dead ends: 2904 [2021-08-06 20:11:27,347 INFO L226 Difference]: Without dead ends: 2899 [2021-08-06 20:11:27,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1768.0ms TimeCoverageRelationStatistics Valid=62, Invalid=240, Unknown=4, NotChecked=0, Total=306 [2021-08-06 20:11:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-08-06 20:11:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2305. [2021-08-06 20:11:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 1.7161458333333333) internal successors, (3954), 2304 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3954 transitions. [2021-08-06 20:11:27,367 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3954 transitions. Word has length 35 [2021-08-06 20:11:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:27,367 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3954 transitions. [2021-08-06 20:11:27,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3954 transitions. [2021-08-06 20:11:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:11:27,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:27,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:27,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 20:11:27,584 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 [2021-08-06 20:11:27,585 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash -745410170, now seen corresponding path program 68 times [2021-08-06 20:11:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:27,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595316266] [2021-08-06 20:11:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:27,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:27,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:11:27,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:11:27,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:11:27,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 76.2 percent of original size [2021-08-06 20:11:27,659 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:11:27,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 73.7 percent of original size [2021-08-06 20:11:27,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:11:27,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 60.5 percent of original size [2021-08-06 20:11:27,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:11:27,692 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 58.3 percent of original size [2021-08-06 20:11:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:11:27,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:27,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595316266] [2021-08-06 20:11:27,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595316266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:27,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378825570] [2021-08-06 20:11:27,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:27,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:27,744 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) [2021-08-06 20:11:27,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:11:29,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:29,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:29,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:11:29,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:30,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-06 20:11:30,468 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 20:11:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 42 [2021-08-06 20:11:31,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:31,362 INFO L388 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 31 treesize of output 26 [2021-08-06 20:11:31,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:31,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-06 20:11:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:11:31,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378825570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:31,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:31,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:11:31,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736552140] [2021-08-06 20:11:31,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:11:31,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:11:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=214, Unknown=2, NotChecked=0, Total=272 [2021-08-06 20:11:31,415 INFO L87 Difference]: Start difference. First operand 2305 states and 3954 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:11:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:34,344 INFO L93 Difference]: Finished difference Result 2882 states and 4927 transitions. [2021-08-06 20:11:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:11:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 35 [2021-08-06 20:11:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:34,347 INFO L225 Difference]: With dead ends: 2882 [2021-08-06 20:11:34,347 INFO L226 Difference]: Without dead ends: 2877 [2021-08-06 20:11:34,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1042.4ms TimeCoverageRelationStatistics Valid=70, Invalid=270, Unknown=2, NotChecked=0, Total=342 [2021-08-06 20:11:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2021-08-06 20:11:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2298. [2021-08-06 20:11:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 1.7122333478450151) internal successors, (3933), 2297 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 3933 transitions. [2021-08-06 20:11:34,366 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 3933 transitions. Word has length 35 [2021-08-06 20:11:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:34,366 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 3933 transitions. [2021-08-06 20:11:34,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-08-06 20:11:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 3933 transitions. [2021-08-06 20:11:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 20:11:34,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:34,369 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:34,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:34,584 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 [2021-08-06 20:11:34,585 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1228930780, now seen corresponding path program 69 times [2021-08-06 20:11:34,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:34,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618885048] [2021-08-06 20:11:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:34,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:34,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:34,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618885048] [2021-08-06 20:11:34,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618885048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:34,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513204344] [2021-08-06 20:11:34,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:34,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:34,632 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) [2021-08-06 20:11:34,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:11:36,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:11:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:11:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:36,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:36,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:11:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513204344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:36,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:36,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 7 [2021-08-06 20:11:36,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263216600] [2021-08-06 20:11:36,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:11:36,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:11:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:11:36,959 INFO L87 Difference]: Start difference. First operand 2298 states and 3933 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:36,990 INFO L93 Difference]: Finished difference Result 3332 states and 5612 transitions. [2021-08-06 20:11:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:11:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 20:11:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:36,994 INFO L225 Difference]: With dead ends: 3332 [2021-08-06 20:11:36,994 INFO L226 Difference]: Without dead ends: 3259 [2021-08-06 20:11:36,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:11:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-08-06 20:11:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 2566. [2021-08-06 20:11:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 2565 states have (on average 1.6994152046783626) internal successors, (4359), 2565 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 4359 transitions. [2021-08-06 20:11:37,017 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 4359 transitions. Word has length 37 [2021-08-06 20:11:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:37,017 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 4359 transitions. [2021-08-06 20:11:37,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 4359 transitions. [2021-08-06 20:11:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:37,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:37,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:37,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 20:11:37,238 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 [2021-08-06 20:11:37,239 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1579384483, now seen corresponding path program 70 times [2021-08-06 20:11:37,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:37,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172602422] [2021-08-06 20:11:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:37,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:37,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172602422] [2021-08-06 20:11:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172602422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906180062] [2021-08-06 20:11:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:37,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:37,328 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) [2021-08-06 20:11:37,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:11:39,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:11:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:39,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:11:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:11:39,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:11:39,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:11:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:39,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906180062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:39,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:39,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:11:39,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663684907] [2021-08-06 20:11:39,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:11:39,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:11:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:39,770 INFO L87 Difference]: Start difference. First operand 2566 states and 4359 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:40,671 INFO L93 Difference]: Finished difference Result 6153 states and 10418 transitions. [2021-08-06 20:11:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:11:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:40,677 INFO L225 Difference]: With dead ends: 6153 [2021-08-06 20:11:40,677 INFO L226 Difference]: Without dead ends: 5820 [2021-08-06 20:11:40,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 626.9ms TimeCoverageRelationStatistics Valid=491, Invalid=2265, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:11:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-08-06 20:11:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 3786. [2021-08-06 20:11:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 1.7519154557463672) internal successors, (6631), 3785 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 6631 transitions. [2021-08-06 20:11:40,721 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 6631 transitions. Word has length 39 [2021-08-06 20:11:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:40,722 INFO L470 AbstractCegarLoop]: Abstraction has 3786 states and 6631 transitions. [2021-08-06 20:11:40,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 6631 transitions. [2021-08-06 20:11:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:40,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:40,725 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:40,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:40,947 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 [2021-08-06 20:11:40,948 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2139547299, now seen corresponding path program 71 times [2021-08-06 20:11:40,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:40,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062832745] [2021-08-06 20:11:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:40,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:41,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:41,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062832745] [2021-08-06 20:11:41,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062832745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:41,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167956963] [2021-08-06 20:11:41,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:11:41,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:41,022 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) [2021-08-06 20:11:41,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:11:43,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:11:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:43,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 53.3 percent of original size [2021-08-06 20:11:43,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 53.3 percent of original size [2021-08-06 20:11:43,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:11:43,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:11:43,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:11:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:43,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167956963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:43,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:43,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:11:43,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058091317] [2021-08-06 20:11:43,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:11:43,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:11:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:11:43,667 INFO L87 Difference]: Start difference. First operand 3786 states and 6631 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:44,273 INFO L93 Difference]: Finished difference Result 6787 states and 11661 transitions. [2021-08-06 20:11:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:11:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:44,282 INFO L225 Difference]: With dead ends: 6787 [2021-08-06 20:11:44,282 INFO L226 Difference]: Without dead ends: 6697 [2021-08-06 20:11:44,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:11:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6697 states. [2021-08-06 20:11:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6697 to 3730. [2021-08-06 20:11:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 1.7524805577902922) internal successors, (6535), 3729 states have internal predecessors, (6535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 6535 transitions. [2021-08-06 20:11:44,330 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 6535 transitions. Word has length 39 [2021-08-06 20:11:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:44,330 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 6535 transitions. [2021-08-06 20:11:44,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 6535 transitions. [2021-08-06 20:11:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:44,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:44,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:44,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:44,557 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 [2021-08-06 20:11:44,557 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1065458339, now seen corresponding path program 72 times [2021-08-06 20:11:44,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:44,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883262520] [2021-08-06 20:11:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:44,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:44,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:44,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883262520] [2021-08-06 20:11:44,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883262520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:44,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810359556] [2021-08-06 20:11:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:11:44,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:44,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:44,645 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) [2021-08-06 20:11:44,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:11:46,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:11:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:47,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:11:47,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 39.1 percent of original size [2021-08-06 20:11:47,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:11:47,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:11:47,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:11:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810359556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:47,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:47,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:11:47,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822615796] [2021-08-06 20:11:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:11:47,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:11:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:11:47,164 INFO L87 Difference]: Start difference. First operand 3730 states and 6535 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-08-06 20:11:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:47,535 INFO L93 Difference]: Finished difference Result 5466 states and 9457 transitions. [2021-08-06 20:11:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:11:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 39 [2021-08-06 20:11:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:47,542 INFO L225 Difference]: With dead ends: 5466 [2021-08-06 20:11:47,542 INFO L226 Difference]: Without dead ends: 5429 [2021-08-06 20:11:47,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:11:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2021-08-06 20:11:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 3747. [2021-08-06 20:11:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 1.7487987186332088) internal successors, (6551), 3746 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 6551 transitions. [2021-08-06 20:11:47,599 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 6551 transitions. Word has length 39 [2021-08-06 20:11:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:47,599 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 6551 transitions. [2021-08-06 20:11:47,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-08-06 20:11:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 6551 transitions. [2021-08-06 20:11:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:47,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:47,603 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:47,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:47,818 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 [2021-08-06 20:11:47,818 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash 851636963, now seen corresponding path program 73 times [2021-08-06 20:11:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:47,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840331309] [2021-08-06 20:11:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:47,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:47,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840331309] [2021-08-06 20:11:47,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840331309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040842919] [2021-08-06 20:11:47,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:11:47,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:47,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:47,915 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) [2021-08-06 20:11:47,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:11:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:50,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:11:50,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:11:50,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:11:50,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:11:50,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:11:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:50,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040842919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:50,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:50,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:11:50,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411228875] [2021-08-06 20:11:50,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:11:50,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:11:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:50,546 INFO L87 Difference]: Start difference. First operand 3747 states and 6551 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) 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) [2021-08-06 20:11:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:51,104 INFO L93 Difference]: Finished difference Result 5753 states and 9639 transitions. [2021-08-06 20:11:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:11:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) 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 39 [2021-08-06 20:11:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:51,111 INFO L225 Difference]: With dead ends: 5753 [2021-08-06 20:11:51,111 INFO L226 Difference]: Without dead ends: 5753 [2021-08-06 20:11:51,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:11:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2021-08-06 20:11:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 4474. [2021-08-06 20:11:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 1.7706237424547284) internal successors, (7920), 4473 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 7920 transitions. [2021-08-06 20:11:51,160 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 7920 transitions. Word has length 39 [2021-08-06 20:11:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:51,161 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 7920 transitions. [2021-08-06 20:11:51,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) 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) [2021-08-06 20:11:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 7920 transitions. [2021-08-06 20:11:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:51,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:51,165 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:51,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:51,380 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 [2021-08-06 20:11:51,381 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1503043017, now seen corresponding path program 74 times [2021-08-06 20:11:51,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:51,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645114432] [2021-08-06 20:11:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:51,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:51,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:51,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:51,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:11:51,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:11:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:51,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:51,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645114432] [2021-08-06 20:11:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645114432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:51,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147197766] [2021-08-06 20:11:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:11:51,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:51,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:51,479 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) [2021-08-06 20:11:51,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:11:53,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:11:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:53,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:53,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:11:54,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:11:54,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:11:54,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:11:54,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:11:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:54,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147197766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:54,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:54,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:11:54,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707630313] [2021-08-06 20:11:54,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:11:54,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:54,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:11:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:54,080 INFO L87 Difference]: Start difference. First operand 4474 states and 7920 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:54,783 INFO L93 Difference]: Finished difference Result 5587 states and 9495 transitions. [2021-08-06 20:11:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:11:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:54,789 INFO L225 Difference]: With dead ends: 5587 [2021-08-06 20:11:54,789 INFO L226 Difference]: Without dead ends: 5587 [2021-08-06 20:11:54,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:11:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-08-06 20:11:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4386. [2021-08-06 20:11:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 1.7760547320410491) internal successors, (7788), 4385 states have internal predecessors, (7788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 7788 transitions. [2021-08-06 20:11:54,834 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 7788 transitions. Word has length 39 [2021-08-06 20:11:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 7788 transitions. [2021-08-06 20:11:54,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 7788 transitions. [2021-08-06 20:11:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:54,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:54,838 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:54,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:55,052 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 [2021-08-06 20:11:55,053 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 771601123, now seen corresponding path program 75 times [2021-08-06 20:11:55,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:55,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221935437] [2021-08-06 20:11:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:55,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:55,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:55,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:55,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221935437] [2021-08-06 20:11:55,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221935437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:55,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750692385] [2021-08-06 20:11:55,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:11:55,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:55,134 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) [2021-08-06 20:11:55,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:11:57,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:11:57,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:11:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:11:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:11:57,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:11:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:11:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:11:57,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:11:57,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:11:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:57,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750692385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:57,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:11:57,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:11:57,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503356195] [2021-08-06 20:11:57,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:11:57,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:11:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:11:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:11:57,818 INFO L87 Difference]: Start difference. First operand 4386 states and 7788 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:11:58,570 INFO L93 Difference]: Finished difference Result 5736 states and 9972 transitions. [2021-08-06 20:11:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:11:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:11:58,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:11:58,575 INFO L225 Difference]: With dead ends: 5736 [2021-08-06 20:11:58,576 INFO L226 Difference]: Without dead ends: 5635 [2021-08-06 20:11:58,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:11:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-08-06 20:11:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 4402. [2021-08-06 20:11:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 4401 states have (on average 1.7834583049306976) internal successors, (7849), 4401 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 7849 transitions. [2021-08-06 20:11:58,618 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 7849 transitions. Word has length 39 [2021-08-06 20:11:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:11:58,619 INFO L470 AbstractCegarLoop]: Abstraction has 4402 states and 7849 transitions. [2021-08-06 20:11:58,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:11:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 7849 transitions. [2021-08-06 20:11:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:11:58,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:11:58,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:11:58,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 20:11:58,833 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 [2021-08-06 20:11:58,833 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:11:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:11:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1842099563, now seen corresponding path program 76 times [2021-08-06 20:11:58,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:11:58,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785809513] [2021-08-06 20:11:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:11:58,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:11:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:11:58,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:58,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:11:58,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:11:58,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:11:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:11:58,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:11:58,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785809513] [2021-08-06 20:11:58,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785809513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:11:58,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101888247] [2021-08-06 20:11:58,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:11:58,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:11:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:11:58,911 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) [2021-08-06 20:11:58,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:12:01,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:01,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:01,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:01,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:12:01,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:12:01,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:12:01,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:01,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:01,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101888247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:01,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:01,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:12:01,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281792849] [2021-08-06 20:12:01,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:12:01,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:01,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:12:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:12:01,493 INFO L87 Difference]: Start difference. First operand 4402 states and 7849 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-08-06 20:12:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:01,981 INFO L93 Difference]: Finished difference Result 6031 states and 10281 transitions. [2021-08-06 20:12:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:12:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 39 [2021-08-06 20:12:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:01,988 INFO L225 Difference]: With dead ends: 6031 [2021-08-06 20:12:01,988 INFO L226 Difference]: Without dead ends: 6031 [2021-08-06 20:12:01,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:12:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-08-06 20:12:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 4402. [2021-08-06 20:12:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 4401 states have (on average 1.7834583049306976) internal successors, (7849), 4401 states have internal predecessors, (7849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 7849 transitions. [2021-08-06 20:12:02,031 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 7849 transitions. Word has length 39 [2021-08-06 20:12:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:02,032 INFO L470 AbstractCegarLoop]: Abstraction has 4402 states and 7849 transitions. [2021-08-06 20:12:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-08-06 20:12:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 7849 transitions. [2021-08-06 20:12:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:02,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:02,036 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:02,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 20:12:02,256 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 [2021-08-06 20:12:02,257 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1721425839, now seen corresponding path program 77 times [2021-08-06 20:12:02,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:02,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672379574] [2021-08-06 20:12:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:02,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:02,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:02,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:02,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:02,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672379574] [2021-08-06 20:12:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672379574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:02,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683496501] [2021-08-06 20:12:02,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:02,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:02,338 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) [2021-08-06 20:12:02,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:12:04,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:12:04,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:04,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:12:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:04,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:04,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:04,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683496501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:04,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:12:04,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777411350] [2021-08-06 20:12:04,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:12:04,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:12:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:12:04,856 INFO L87 Difference]: Start difference. First operand 4402 states and 7849 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:05,437 INFO L93 Difference]: Finished difference Result 5688 states and 9882 transitions. [2021-08-06 20:12:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:12:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:12:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:05,443 INFO L225 Difference]: With dead ends: 5688 [2021-08-06 20:12:05,444 INFO L226 Difference]: Without dead ends: 5587 [2021-08-06 20:12:05,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:12:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-08-06 20:12:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4386. [2021-08-06 20:12:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 1.7746864310148232) internal successors, (7782), 4385 states have internal predecessors, (7782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 7782 transitions. [2021-08-06 20:12:05,488 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 7782 transitions. Word has length 39 [2021-08-06 20:12:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 7782 transitions. [2021-08-06 20:12:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 7782 transitions. [2021-08-06 20:12:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:05,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:05,492 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:05,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:05,711 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 [2021-08-06 20:12:05,711 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash 101599011, now seen corresponding path program 78 times [2021-08-06 20:12:05,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:05,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360130191] [2021-08-06 20:12:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:05,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:05,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:05,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360130191] [2021-08-06 20:12:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360130191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:05,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605436146] [2021-08-06 20:12:05,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:05,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:05,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:05,799 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) [2021-08-06 20:12:05,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:12:08,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:12:08,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:08,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 20:12:08,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 20:12:08,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:08,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:12:08,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:08,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:08,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605436146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:08,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:08,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-08-06 20:12:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731332060] [2021-08-06 20:12:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:12:08,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:12:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:12:08,494 INFO L87 Difference]: Start difference. First operand 4386 states and 7782 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) 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) [2021-08-06 20:12:08,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:08,958 INFO L93 Difference]: Finished difference Result 6795 states and 11334 transitions. [2021-08-06 20:12:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:12:08,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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 39 [2021-08-06 20:12:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:08,966 INFO L225 Difference]: With dead ends: 6795 [2021-08-06 20:12:08,966 INFO L226 Difference]: Without dead ends: 6795 [2021-08-06 20:12:08,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:12:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-08-06 20:12:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 5633. [2021-08-06 20:12:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5633 states, 5632 states have (on average 1.7391690340909092) internal successors, (9795), 5632 states have internal predecessors, (9795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 9795 transitions. [2021-08-06 20:12:09,019 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 9795 transitions. Word has length 39 [2021-08-06 20:12:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:09,019 INFO L470 AbstractCegarLoop]: Abstraction has 5633 states and 9795 transitions. [2021-08-06 20:12:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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) [2021-08-06 20:12:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 9795 transitions. [2021-08-06 20:12:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:09,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:09,024 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:09,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:09,240 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 [2021-08-06 20:12:09,241 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash -207220983, now seen corresponding path program 79 times [2021-08-06 20:12:09,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:09,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14826] [2021-08-06 20:12:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:09,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:09,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:09,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14826] [2021-08-06 20:12:09,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:09,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257920931] [2021-08-06 20:12:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:12:09,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:09,381 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) [2021-08-06 20:12:09,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:12:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:11,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:11,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:12,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:12,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:12:12,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:12,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257920931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:12,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:12,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2021-08-06 20:12:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571419158] [2021-08-06 20:12:12,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:12,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:12,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:12,073 INFO L87 Difference]: Start difference. First operand 5633 states and 9795 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:12,767 INFO L93 Difference]: Finished difference Result 7225 states and 11908 transitions. [2021-08-06 20:12:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:12:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:12:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:12,777 INFO L225 Difference]: With dead ends: 7225 [2021-08-06 20:12:12,777 INFO L226 Difference]: Without dead ends: 7225 [2021-08-06 20:12:12,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:12:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2021-08-06 20:12:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 5213. [2021-08-06 20:12:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 1.7595932463545665) internal successors, (9171), 5212 states have internal predecessors, (9171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 9171 transitions. [2021-08-06 20:12:12,839 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 9171 transitions. Word has length 39 [2021-08-06 20:12:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:12,840 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 9171 transitions. [2021-08-06 20:12:12,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 9171 transitions. [2021-08-06 20:12:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:12,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:12,845 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:12,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:13,055 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 [2021-08-06 20:12:13,055 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:13,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1933790711, now seen corresponding path program 80 times [2021-08-06 20:12:13,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:13,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316136150] [2021-08-06 20:12:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:13,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:13,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:13,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:13,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:12:13,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:12:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:13,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:13,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316136150] [2021-08-06 20:12:13,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316136150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:13,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646354882] [2021-08-06 20:12:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:12:13,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:13,170 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) [2021-08-06 20:12:13,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:12:15,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:12:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:15,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:15,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:15,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:12:15,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 43.8 percent of original size [2021-08-06 20:12:15,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:15,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:15,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646354882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:15,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:15,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2021-08-06 20:12:15,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355749979] [2021-08-06 20:12:15,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:15,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:15,988 INFO L87 Difference]: Start difference. First operand 5213 states and 9171 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) 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) [2021-08-06 20:12:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:16,995 INFO L93 Difference]: Finished difference Result 6788 states and 11402 transitions. [2021-08-06 20:12:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 20:12:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) 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 39 [2021-08-06 20:12:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:17,004 INFO L225 Difference]: With dead ends: 6788 [2021-08-06 20:12:17,004 INFO L226 Difference]: Without dead ends: 6788 [2021-08-06 20:12:17,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:12:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2021-08-06 20:12:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 5114. [2021-08-06 20:12:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5113 states have (on average 1.7613925288480343) internal successors, (9006), 5113 states have internal predecessors, (9006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 9006 transitions. [2021-08-06 20:12:17,089 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 9006 transitions. Word has length 39 [2021-08-06 20:12:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:17,090 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 9006 transitions. [2021-08-06 20:12:17,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) 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) [2021-08-06 20:12:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 9006 transitions. [2021-08-06 20:12:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:17,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:17,095 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:17,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 20:12:17,295 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 [2021-08-06 20:12:17,296 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1629734691, now seen corresponding path program 81 times [2021-08-06 20:12:17,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:17,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778432269] [2021-08-06 20:12:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:17,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:17,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:17,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:17,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:17,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778432269] [2021-08-06 20:12:17,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778432269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:17,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269638442] [2021-08-06 20:12:17,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:12:17,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:17,387 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) [2021-08-06 20:12:17,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:12:19,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:12:19,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:19,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:20,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:20,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:20,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:20,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269638442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:20,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:12:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396324022] [2021-08-06 20:12:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:20,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:20,182 INFO L87 Difference]: Start difference. First operand 5114 states and 9006 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:21,043 INFO L93 Difference]: Finished difference Result 5888 states and 10150 transitions. [2021-08-06 20:12:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:12:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:12:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:21,050 INFO L225 Difference]: With dead ends: 5888 [2021-08-06 20:12:21,050 INFO L226 Difference]: Without dead ends: 5787 [2021-08-06 20:12:21,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:12:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2021-08-06 20:12:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5015. [2021-08-06 20:12:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5014 states have (on average 1.75428799361787) internal successors, (8796), 5014 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 8796 transitions. [2021-08-06 20:12:21,099 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 8796 transitions. Word has length 39 [2021-08-06 20:12:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:21,099 INFO L470 AbstractCegarLoop]: Abstraction has 5015 states and 8796 transitions. [2021-08-06 20:12:21,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:21,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 8796 transitions. [2021-08-06 20:12:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:21,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:21,104 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:21,311 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 [2021-08-06 20:12:21,311 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 897140515, now seen corresponding path program 82 times [2021-08-06 20:12:21,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:21,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210462393] [2021-08-06 20:12:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:21,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:21,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:21,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210462393] [2021-08-06 20:12:21,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210462393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:21,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321533447] [2021-08-06 20:12:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:12:21,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:21,389 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) [2021-08-06 20:12:21,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:12:23,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:23,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:24,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:24,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:24,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:24,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321533447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:24,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:24,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:12:24,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372460016] [2021-08-06 20:12:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:24,194 INFO L87 Difference]: Start difference. First operand 5015 states and 8796 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:24,711 INFO L93 Difference]: Finished difference Result 6680 states and 11315 transitions. [2021-08-06 20:12:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:12:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:12:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:24,719 INFO L225 Difference]: With dead ends: 6680 [2021-08-06 20:12:24,719 INFO L226 Difference]: Without dead ends: 6490 [2021-08-06 20:12:24,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:12:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-08-06 20:12:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5100. [2021-08-06 20:12:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 1.7442635810943323) internal successors, (8894), 5099 states have internal predecessors, (8894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 8894 transitions. [2021-08-06 20:12:24,777 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 8894 transitions. Word has length 39 [2021-08-06 20:12:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:24,777 INFO L470 AbstractCegarLoop]: Abstraction has 5100 states and 8894 transitions. [2021-08-06 20:12:24,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 8894 transitions. [2021-08-06 20:12:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:24,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:24,784 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:24,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:25,007 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 [2021-08-06 20:12:25,007 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:25,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1519912157, now seen corresponding path program 83 times [2021-08-06 20:12:25,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:25,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394948735] [2021-08-06 20:12:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:25,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:25,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:25,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394948735] [2021-08-06 20:12:25,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394948735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:25,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010738737] [2021-08-06 20:12:25,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:25,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:25,066 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:25,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:12:27,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:12:27,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:27,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:27,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:27,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:27,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:12:27,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 20:12:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:27,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010738737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:27,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:27,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:12:27,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477355973] [2021-08-06 20:12:27,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:27,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:27,867 INFO L87 Difference]: Start difference. First operand 5100 states and 8894 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:28,873 INFO L93 Difference]: Finished difference Result 7103 states and 12908 transitions. [2021-08-06 20:12:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:12:28,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 20:12:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:28,881 INFO L225 Difference]: With dead ends: 7103 [2021-08-06 20:12:28,881 INFO L226 Difference]: Without dead ends: 7050 [2021-08-06 20:12:28,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:12:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2021-08-06 20:12:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 4968. [2021-08-06 20:12:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4968 states, 4967 states have (on average 1.750150996577411) internal successors, (8693), 4967 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4968 states to 4968 states and 8693 transitions. [2021-08-06 20:12:28,934 INFO L78 Accepts]: Start accepts. Automaton has 4968 states and 8693 transitions. Word has length 39 [2021-08-06 20:12:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:28,935 INFO L470 AbstractCegarLoop]: Abstraction has 4968 states and 8693 transitions. [2021-08-06 20:12:28,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4968 states and 8693 transitions. [2021-08-06 20:12:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 20:12:28,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:28,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:28,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:29,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:29,163 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1457303331, now seen corresponding path program 84 times [2021-08-06 20:12:29,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:29,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347324062] [2021-08-06 20:12:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:29,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:29,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:29,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347324062] [2021-08-06 20:12:29,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347324062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:29,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987714173] [2021-08-06 20:12:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:29,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:29,301 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:29,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:12:31,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:12:31,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:31,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:32,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 53.3 percent of original size [2021-08-06 20:12:32,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 53.3 percent of original size [2021-08-06 20:12:32,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:32,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:12:32,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:12:32,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 29.4 percent of original size [2021-08-06 20:12:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:12:32,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987714173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:32,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:32,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:12:32,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703060521] [2021-08-06 20:12:32,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:12:32,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:32,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:12:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:12:32,209 INFO L87 Difference]: Start difference. First operand 4968 states and 8693 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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) [2021-08-06 20:12:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:32,562 INFO L93 Difference]: Finished difference Result 7109 states and 12307 transitions. [2021-08-06 20:12:32,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:12:32,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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 39 [2021-08-06 20:12:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:32,570 INFO L225 Difference]: With dead ends: 7109 [2021-08-06 20:12:32,570 INFO L226 Difference]: Without dead ends: 7084 [2021-08-06 20:12:32,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:12:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7084 states. [2021-08-06 20:12:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7084 to 4911. [2021-08-06 20:12:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4911 states, 4910 states have (on average 1.744399185336049) internal successors, (8565), 4910 states have internal predecessors, (8565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4911 states to 4911 states and 8565 transitions. [2021-08-06 20:12:32,617 INFO L78 Accepts]: Start accepts. Automaton has 4911 states and 8565 transitions. Word has length 39 [2021-08-06 20:12:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:32,617 INFO L470 AbstractCegarLoop]: Abstraction has 4911 states and 8565 transitions. [2021-08-06 20:12:32,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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) [2021-08-06 20:12:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4911 states and 8565 transitions. [2021-08-06 20:12:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:32,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:32,621 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:32,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 20:12:32,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:32,835 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1804068607, now seen corresponding path program 85 times [2021-08-06 20:12:32,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:32,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285629066] [2021-08-06 20:12:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:32,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:32,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:32,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285629066] [2021-08-06 20:12:32,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285629066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:32,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604751974] [2021-08-06 20:12:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:12:32,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:32,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:32,924 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:32,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:12:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:35,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:35,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 20:12:35,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 45.8 percent of original size [2021-08-06 20:12:35,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:35,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:12:35,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:35,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604751974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:35,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:35,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-08-06 20:12:35,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204025316] [2021-08-06 20:12:35,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:12:35,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:12:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:12:35,719 INFO L87 Difference]: Start difference. First operand 4911 states and 8565 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) 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) [2021-08-06 20:12:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:37,359 INFO L93 Difference]: Finished difference Result 9381 states and 16326 transitions. [2021-08-06 20:12:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 20:12:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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 41 [2021-08-06 20:12:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:37,369 INFO L225 Difference]: With dead ends: 9381 [2021-08-06 20:12:37,370 INFO L226 Difference]: Without dead ends: 9381 [2021-08-06 20:12:37,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1038.0ms TimeCoverageRelationStatistics Valid=749, Invalid=4801, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:12:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9381 states. [2021-08-06 20:12:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9381 to 5943. [2021-08-06 20:12:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 5942 states have (on average 1.8037697744867047) internal successors, (10718), 5942 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 10718 transitions. [2021-08-06 20:12:37,435 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 10718 transitions. Word has length 41 [2021-08-06 20:12:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:37,436 INFO L470 AbstractCegarLoop]: Abstraction has 5943 states and 10718 transitions. [2021-08-06 20:12:37,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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) [2021-08-06 20:12:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 10718 transitions. [2021-08-06 20:12:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:37,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:37,441 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:37,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:37,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 20:12:37,661 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1372740929, now seen corresponding path program 86 times [2021-08-06 20:12:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:37,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426963339] [2021-08-06 20:12:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:37,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:37,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:37,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:12:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:37,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:37,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426963339] [2021-08-06 20:12:37,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426963339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:37,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129845228] [2021-08-06 20:12:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:12:37,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:37,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:37,733 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:37,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:12:40,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:12:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:40,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:40,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:40,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:40,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129845228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:40,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:40,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:12:40,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370171873] [2021-08-06 20:12:40,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:40,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:40,687 INFO L87 Difference]: Start difference. First operand 5943 states and 10718 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:42,464 INFO L93 Difference]: Finished difference Result 9281 states and 16483 transitions. [2021-08-06 20:12:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 20:12:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:42,476 INFO L225 Difference]: With dead ends: 9281 [2021-08-06 20:12:42,476 INFO L226 Difference]: Without dead ends: 9281 [2021-08-06 20:12:42,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1319.3ms TimeCoverageRelationStatistics Valid=598, Invalid=4094, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 20:12:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2021-08-06 20:12:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 6104. [2021-08-06 20:12:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 6103 states have (on average 1.814845158118958) internal successors, (11076), 6103 states have internal predecessors, (11076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 11076 transitions. [2021-08-06 20:12:42,550 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 11076 transitions. Word has length 41 [2021-08-06 20:12:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 6104 states and 11076 transitions. [2021-08-06 20:12:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 11076 transitions. [2021-08-06 20:12:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:42,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:42,557 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:42,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:42,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:42,771 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash -772164889, now seen corresponding path program 87 times [2021-08-06 20:12:42,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:42,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638306676] [2021-08-06 20:12:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:42,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:42,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:12:42,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:12:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:42,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:42,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638306676] [2021-08-06 20:12:42,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638306676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:42,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50097003] [2021-08-06 20:12:42,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:12:42,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:42,868 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:42,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:12:45,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:12:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:45,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:45,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:45,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:45,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:12:45,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:45,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:45,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50097003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:45,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:45,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:12:45,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147141865] [2021-08-06 20:12:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:45,823 INFO L87 Difference]: Start difference. First operand 6104 states and 11076 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:47,930 INFO L93 Difference]: Finished difference Result 12968 states and 23843 transitions. [2021-08-06 20:12:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:12:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:47,947 INFO L225 Difference]: With dead ends: 12968 [2021-08-06 20:12:47,948 INFO L226 Difference]: Without dead ends: 12968 [2021-08-06 20:12:47,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 1316.9ms TimeCoverageRelationStatistics Valid=789, Invalid=5217, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 20:12:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12968 states. [2021-08-06 20:12:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12968 to 5901. [2021-08-06 20:12:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5901 states, 5900 states have (on average 1.8338983050847457) internal successors, (10820), 5900 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5901 states to 5901 states and 10820 transitions. [2021-08-06 20:12:48,037 INFO L78 Accepts]: Start accepts. Automaton has 5901 states and 10820 transitions. Word has length 41 [2021-08-06 20:12:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:48,037 INFO L470 AbstractCegarLoop]: Abstraction has 5901 states and 10820 transitions. [2021-08-06 20:12:48,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5901 states and 10820 transitions. [2021-08-06 20:12:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:48,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:48,043 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:48,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 20:12:48,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:48,259 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1812954751, now seen corresponding path program 88 times [2021-08-06 20:12:48,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:48,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573037326] [2021-08-06 20:12:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:48,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:48,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:48,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573037326] [2021-08-06 20:12:48,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573037326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:48,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187430708] [2021-08-06 20:12:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:12:48,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:48,312 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:48,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:12:50,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:12:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:51,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:51,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:12:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:51,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:51,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:51,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187430708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:51,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:51,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:12:51,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674411040] [2021-08-06 20:12:51,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:12:51,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:12:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:12:51,286 INFO L87 Difference]: Start difference. First operand 5901 states and 10820 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:51,806 INFO L93 Difference]: Finished difference Result 8132 states and 14659 transitions. [2021-08-06 20:12:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:12:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:51,817 INFO L225 Difference]: With dead ends: 8132 [2021-08-06 20:12:51,818 INFO L226 Difference]: Without dead ends: 8132 [2021-08-06 20:12:51,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:12:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-08-06 20:12:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 5942. [2021-08-06 20:12:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 1.8436290186837232) internal successors, (10953), 5941 states have internal predecessors, (10953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 10953 transitions. [2021-08-06 20:12:51,892 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 10953 transitions. Word has length 41 [2021-08-06 20:12:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:51,892 INFO L470 AbstractCegarLoop]: Abstraction has 5942 states and 10953 transitions. [2021-08-06 20:12:51,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 10953 transitions. [2021-08-06 20:12:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:51,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:51,899 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:51,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:12:52,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:52,109 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash 435530573, now seen corresponding path program 89 times [2021-08-06 20:12:52,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:52,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073657882] [2021-08-06 20:12:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:52,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:52,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073657882] [2021-08-06 20:12:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073657882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:52,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988975486] [2021-08-06 20:12:52,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:12:52,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:52,159 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:52,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:12:54,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:12:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:54,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:54,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 18 [2021-08-06 20:12:54,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:12:55,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:55,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:12:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:55,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988975486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:55,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:55,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:12:55,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832292424] [2021-08-06 20:12:55,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:12:55,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:12:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:12:55,085 INFO L87 Difference]: Start difference. First operand 5942 states and 10953 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:12:55,572 INFO L93 Difference]: Finished difference Result 8529 states and 15140 transitions. [2021-08-06 20:12:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:12:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:12:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:12:55,583 INFO L225 Difference]: With dead ends: 8529 [2021-08-06 20:12:55,583 INFO L226 Difference]: Without dead ends: 8529 [2021-08-06 20:12:55,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:12:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2021-08-06 20:12:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 5894. [2021-08-06 20:12:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5893 states have (on average 1.8325131511963346) internal successors, (10799), 5893 states have internal predecessors, (10799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 10799 transitions. [2021-08-06 20:12:55,646 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 10799 transitions. Word has length 41 [2021-08-06 20:12:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:12:55,646 INFO L470 AbstractCegarLoop]: Abstraction has 5894 states and 10799 transitions. [2021-08-06 20:12:55,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:12:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 10799 transitions. [2021-08-06 20:12:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:12:55,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:12:55,652 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:12:55,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 20:12:55,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 20:12:55,865 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:12:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:12:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -940601779, now seen corresponding path program 90 times [2021-08-06 20:12:55,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:12:55,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700755051] [2021-08-06 20:12:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:12:55,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:12:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:12:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-06 20:12:55,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:12:55,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700755051] [2021-08-06 20:12:55,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700755051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:55,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114709025] [2021-08-06 20:12:55,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:12:55,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:12:55,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:12:55,948 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:12:55,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:12:58,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:12:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:12:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:12:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:12:58,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:58,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:12:58,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:12:58,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:12:58,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:58,869 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:12:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:12:58,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114709025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:12:58,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:12:58,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:12:58,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672599523] [2021-08-06 20:12:58,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:12:58,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:12:58,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:12:58,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:12:58,932 INFO L87 Difference]: Start difference. First operand 5894 states and 10799 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) [2021-08-06 20:13:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:00,200 INFO L93 Difference]: Finished difference Result 10988 states and 18908 transitions. [2021-08-06 20:13:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-06 20:13:00,200 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 41 [2021-08-06 20:13:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:00,214 INFO L225 Difference]: With dead ends: 10988 [2021-08-06 20:13:00,214 INFO L226 Difference]: Without dead ends: 10988 [2021-08-06 20:13:00,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 784.0ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 20:13:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-08-06 20:13:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4485. [2021-08-06 20:13:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 1.7232381801962533) internal successors, (7727), 4484 states have internal predecessors, (7727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 7727 transitions. [2021-08-06 20:13:00,287 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 7727 transitions. Word has length 41 [2021-08-06 20:13:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:00,287 INFO L470 AbstractCegarLoop]: Abstraction has 4485 states and 7727 transitions. [2021-08-06 20:13:00,287 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) [2021-08-06 20:13:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 7727 transitions. [2021-08-06 20:13:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:13:00,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:00,291 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:00,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:00,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:00,507 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1780316735, now seen corresponding path program 91 times [2021-08-06 20:13:00,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:00,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310725984] [2021-08-06 20:13:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:00,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:00,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:00,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310725984] [2021-08-06 20:13:00,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310725984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:00,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66829912] [2021-08-06 20:13:00,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:13:00,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:00,592 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:00,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:13:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:13:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:03,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:03,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:13:03,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:13:03,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:13:03,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:13:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:03,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66829912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:03,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:03,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:13:03,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778009285] [2021-08-06 20:13:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:13:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:13:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:13:03,685 INFO L87 Difference]: Start difference. First operand 4485 states and 7727 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:04,179 INFO L93 Difference]: Finished difference Result 5941 states and 10139 transitions. [2021-08-06 20:13:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:13:04,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:13:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:04,186 INFO L225 Difference]: With dead ends: 5941 [2021-08-06 20:13:04,186 INFO L226 Difference]: Without dead ends: 5941 [2021-08-06 20:13:04,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:13:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-08-06 20:13:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 4478. [2021-08-06 20:13:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 1.721241903060085) internal successors, (7706), 4477 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 7706 transitions. [2021-08-06 20:13:04,234 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 7706 transitions. Word has length 41 [2021-08-06 20:13:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:04,234 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 7706 transitions. [2021-08-06 20:13:04,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 7706 transitions. [2021-08-06 20:13:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:13:04,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:04,239 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:04,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 20:13:04,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:04,443 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:04,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1428683327, now seen corresponding path program 92 times [2021-08-06 20:13:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:04,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247253591] [2021-08-06 20:13:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:04,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:04,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:13:04,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 53.6 percent of original size [2021-08-06 20:13:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:04,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:04,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247253591] [2021-08-06 20:13:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247253591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:04,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647518574] [2021-08-06 20:13:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:13:04,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:04,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:04,530 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:04,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:13:07,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:13:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:13:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:07,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:07,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 28 [2021-08-06 20:13:07,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-06 20:13:07,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:13:07,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 20:13:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:07,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647518574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:07,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:07,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:13:07,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702843904] [2021-08-06 20:13:07,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:13:07,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:13:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:13:07,644 INFO L87 Difference]: Start difference. First operand 4478 states and 7706 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:08,714 INFO L93 Difference]: Finished difference Result 6710 states and 11510 transitions. [2021-08-06 20:13:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 20:13:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:13:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:08,723 INFO L225 Difference]: With dead ends: 6710 [2021-08-06 20:13:08,723 INFO L226 Difference]: Without dead ends: 6710 [2021-08-06 20:13:08,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:13:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-08-06 20:13:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 4634. [2021-08-06 20:13:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 1.7345132743362832) internal successors, (8036), 4633 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8036 transitions. [2021-08-06 20:13:08,777 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8036 transitions. Word has length 41 [2021-08-06 20:13:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:08,777 INFO L470 AbstractCegarLoop]: Abstraction has 4634 states and 8036 transitions. [2021-08-06 20:13:08,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8036 transitions. [2021-08-06 20:13:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 20:13:08,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:08,782 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:08,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:09,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:09,001 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash 721378151, now seen corresponding path program 93 times [2021-08-06 20:13:09,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:09,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531982519] [2021-08-06 20:13:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:09,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:09,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:13:09,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 50.0 percent of original size [2021-08-06 20:13:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:09,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:09,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531982519] [2021-08-06 20:13:09,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531982519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:09,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515426149] [2021-08-06 20:13:09,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:13:09,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:09,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:09,055 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:09,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:13:11,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:13:11,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 20:13:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:11,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:13:11,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 20:13:12,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 19 [2021-08-06 20:13:12,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:13:12,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 20:13:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 20:13:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515426149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:12,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:12,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:13:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373268781] [2021-08-06 20:13:12,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:13:12,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:13:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:13:12,122 INFO L87 Difference]: Start difference. First operand 4634 states and 8036 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:13,003 INFO L93 Difference]: Finished difference Result 8478 states and 14304 transitions. [2021-08-06 20:13:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:13:13,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 20:13:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:13,015 INFO L225 Difference]: With dead ends: 8478 [2021-08-06 20:13:13,015 INFO L226 Difference]: Without dead ends: 8478 [2021-08-06 20:13:13,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:13:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8478 states. [2021-08-06 20:13:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8478 to 4176. [2021-08-06 20:13:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 4175 states have (on average 1.6747305389221556) internal successors, (6992), 4175 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 6992 transitions. [2021-08-06 20:13:13,069 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 6992 transitions. Word has length 41 [2021-08-06 20:13:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:13,069 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 6992 transitions. [2021-08-06 20:13:13,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 6992 transitions. [2021-08-06 20:13:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:13:13,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:13,073 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:13,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:13,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:13,274 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1372253376, now seen corresponding path program 94 times [2021-08-06 20:13:13,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:13,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004866547] [2021-08-06 20:13:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:13,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 20:13:13,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:13,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004866547] [2021-08-06 20:13:13,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004866547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:13,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098812822] [2021-08-06 20:13:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:13:13,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:13,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:13,327 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:13,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:13:16,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:13:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:13:16,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:16,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:13:16,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:13:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-06 20:13:16,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098812822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:16,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:16,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 20:13:16,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48194366] [2021-08-06 20:13:16,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:13:16,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:13:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:13:16,266 INFO L87 Difference]: Start difference. First operand 4176 states and 6992 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:16,290 INFO L93 Difference]: Finished difference Result 5883 states and 9827 transitions. [2021-08-06 20:13:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 20:13:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:13:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:16,296 INFO L225 Difference]: With dead ends: 5883 [2021-08-06 20:13:16,296 INFO L226 Difference]: Without dead ends: 5883 [2021-08-06 20:13:16,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:13:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2021-08-06 20:13:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 4752. [2021-08-06 20:13:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4752 states, 4751 states have (on average 1.6724900021048201) internal successors, (7946), 4751 states have internal predecessors, (7946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4752 states to 4752 states and 7946 transitions. [2021-08-06 20:13:16,339 INFO L78 Accepts]: Start accepts. Automaton has 4752 states and 7946 transitions. Word has length 43 [2021-08-06 20:13:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:16,339 INFO L470 AbstractCegarLoop]: Abstraction has 4752 states and 7946 transitions. [2021-08-06 20:13:16,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4752 states and 7946 transitions. [2021-08-06 20:13:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:13:16,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:16,344 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:16,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:16,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 20:13:16,548 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash 611834910, now seen corresponding path program 95 times [2021-08-06 20:13:16,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:16,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949708755] [2021-08-06 20:13:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:16,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:16,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:16,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:16,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949708755] [2021-08-06 20:13:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949708755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:16,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896118745] [2021-08-06 20:13:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:13:16,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:16,881 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:16,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:13:19,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:13:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:13:19,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:22,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 72 treesize of output 71 [2021-08-06 20:13:22,603 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:13:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 75 [2021-08-06 20:13:27,322 INFO L354 Elim1Store]: treesize reduction 127, result has 35.5 percent of original size [2021-08-06 20:13:27,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 99 [2021-08-06 20:13:27,333 INFO L354 Elim1Store]: treesize reduction 76, result has 3.8 percent of original size [2021-08-06 20:13:27,334 INFO L388 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 81 treesize of output 57 [2021-08-06 20:13:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896118745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:27,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:27,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 20:13:27,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479086495] [2021-08-06 20:13:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:13:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:13:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=625, Unknown=5, NotChecked=0, Total=702 [2021-08-06 20:13:27,392 INFO L87 Difference]: Start difference. First operand 4752 states and 7946 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-08-06 20:13:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:47,509 INFO L93 Difference]: Finished difference Result 6923 states and 12084 transitions. [2021-08-06 20:13:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:13:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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 45 [2021-08-06 20:13:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:47,517 INFO L225 Difference]: With dead ends: 6923 [2021-08-06 20:13:47,517 INFO L226 Difference]: Without dead ends: 6914 [2021-08-06 20:13:47,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 6868.9ms TimeCoverageRelationStatistics Valid=116, Invalid=1138, Unknown=6, NotChecked=0, Total=1260 [2021-08-06 20:13:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6914 states. [2021-08-06 20:13:47,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6914 to 5019. [2021-08-06 20:13:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5019 states, 5018 states have (on average 1.6813471502590673) internal successors, (8437), 5018 states have internal predecessors, (8437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5019 states to 5019 states and 8437 transitions. [2021-08-06 20:13:47,568 INFO L78 Accepts]: Start accepts. Automaton has 5019 states and 8437 transitions. Word has length 45 [2021-08-06 20:13:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:47,568 INFO L470 AbstractCegarLoop]: Abstraction has 5019 states and 8437 transitions. [2021-08-06 20:13:47,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 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) [2021-08-06 20:13:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5019 states and 8437 transitions. [2021-08-06 20:13:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:13:47,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:47,573 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:47,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 20:13:47,793 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 937355166, now seen corresponding path program 96 times [2021-08-06 20:13:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:47,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199329046] [2021-08-06 20:13:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:47,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:47,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:47,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:48,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:48,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199329046] [2021-08-06 20:13:48,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199329046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:48,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375939701] [2021-08-06 20:13:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:13:48,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:48,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:48,111 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:13:51,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:13:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:13:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:13:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:51,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 55 [2021-08-06 20:13:52,068 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:13:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 74 [2021-08-06 20:13:52,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:52,208 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:13:52,211 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:13:52,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:13:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:52,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375939701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:52,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:52,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:13:52,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723206417] [2021-08-06 20:13:52,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:13:52,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:13:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:13:52,266 INFO L87 Difference]: Start difference. First operand 5019 states and 8437 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:13:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:52,713 INFO L93 Difference]: Finished difference Result 6980 states and 12164 transitions. [2021-08-06 20:13:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:13:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 45 [2021-08-06 20:13:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:52,721 INFO L225 Difference]: With dead ends: 6980 [2021-08-06 20:13:52,722 INFO L226 Difference]: Without dead ends: 6971 [2021-08-06 20:13:52,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:13:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6971 states. [2021-08-06 20:13:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6971 to 5084. [2021-08-06 20:13:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 1.6801101711587645) internal successors, (8540), 5083 states have internal predecessors, (8540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 8540 transitions. [2021-08-06 20:13:52,801 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 8540 transitions. Word has length 45 [2021-08-06 20:13:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:52,801 INFO L470 AbstractCegarLoop]: Abstraction has 5084 states and 8540 transitions. [2021-08-06 20:13:52,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:13:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 8540 transitions. [2021-08-06 20:13:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:13:52,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:52,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:52,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:53,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:53,021 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 199011294, now seen corresponding path program 97 times [2021-08-06 20:13:53,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:53,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645802958] [2021-08-06 20:13:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:53,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:53,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:53,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:53,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645802958] [2021-08-06 20:13:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645802958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:53,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767727017] [2021-08-06 20:13:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:13:53,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:53,312 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:53,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:13:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:13:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:13:56,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:56,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 55 [2021-08-06 20:13:57,613 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:13:57,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 82 [2021-08-06 20:13:57,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:13:57,727 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:13:57,730 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:13:57,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:13:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767727017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:57,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:13:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:13:57,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872245897] [2021-08-06 20:13:57,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:13:57,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:13:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:13:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:13:57,776 INFO L87 Difference]: Start difference. First operand 5084 states and 8540 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:13:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:13:58,142 INFO L93 Difference]: Finished difference Result 7487 states and 12914 transitions. [2021-08-06 20:13:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:13:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 45 [2021-08-06 20:13:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:13:58,152 INFO L225 Difference]: With dead ends: 7487 [2021-08-06 20:13:58,152 INFO L226 Difference]: Without dead ends: 7478 [2021-08-06 20:13:58,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:13:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-08-06 20:13:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5146. [2021-08-06 20:13:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5145 states have (on average 1.6793002915451896) internal successors, (8640), 5145 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:13:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 8640 transitions. [2021-08-06 20:13:58,210 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 8640 transitions. Word has length 45 [2021-08-06 20:13:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:13:58,210 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 8640 transitions. [2021-08-06 20:13:58,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:13:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 8640 transitions. [2021-08-06 20:13:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:13:58,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:13:58,215 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:13:58,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:13:58,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:58,439 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:13:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:13:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1593933794, now seen corresponding path program 98 times [2021-08-06 20:13:58,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:13:58,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087646573] [2021-08-06 20:13:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:13:58,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:13:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:13:58,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:58,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:13:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:13:58,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:13:58,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087646573] [2021-08-06 20:13:58,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087646573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:13:58,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627111840] [2021-08-06 20:13:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:13:58,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:13:58,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:13:58,764 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:13:58,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:14:01,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:14:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:14:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:02,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 55 [2021-08-06 20:14:03,076 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:14:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 52 [2021-08-06 20:14:03,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:03,197 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:03,212 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:03,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:14:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:03,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627111840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:03,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:03,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:14:03,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386578046] [2021-08-06 20:14:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:14:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:14:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:03,302 INFO L87 Difference]: Start difference. First operand 5146 states and 8640 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:03,619 INFO L93 Difference]: Finished difference Result 7520 states and 12893 transitions. [2021-08-06 20:14:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:14:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 45 [2021-08-06 20:14:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:03,628 INFO L225 Difference]: With dead ends: 7520 [2021-08-06 20:14:03,628 INFO L226 Difference]: Without dead ends: 7495 [2021-08-06 20:14:03,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2021-08-06 20:14:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 5168. [2021-08-06 20:14:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 5167 states have (on average 1.6783433326882136) internal successors, (8672), 5167 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 8672 transitions. [2021-08-06 20:14:03,681 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 8672 transitions. Word has length 45 [2021-08-06 20:14:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 5168 states and 8672 transitions. [2021-08-06 20:14:03,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 8672 transitions. [2021-08-06 20:14:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:03,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:03,687 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:03,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:03,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 20:14:03,909 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash -506186978, now seen corresponding path program 99 times [2021-08-06 20:14:03,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:03,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319143754] [2021-08-06 20:14:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:03,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:03,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:03,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:04,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:04,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319143754] [2021-08-06 20:14:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319143754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:04,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404592492] [2021-08-06 20:14:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:14:04,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:04,254 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:04,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:14:07,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:14:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:14:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:08,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:08,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 77 treesize of output 76 [2021-08-06 20:14:09,539 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:09,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 80 [2021-08-06 20:14:09,872 INFO L354 Elim1Store]: treesize reduction 78, result has 60.4 percent of original size [2021-08-06 20:14:09,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 148 [2021-08-06 20:14:09,894 INFO L354 Elim1Store]: treesize reduction 109, result has 9.9 percent of original size [2021-08-06 20:14:09,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 94 [2021-08-06 20:14:09,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:14:09,984 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:14:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:10,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404592492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:10,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:10,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:14:10,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378043059] [2021-08-06 20:14:10,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:14:10,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:14:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:14:10,029 INFO L87 Difference]: Start difference. First operand 5168 states and 8672 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:14:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:13,054 INFO L93 Difference]: Finished difference Result 7758 states and 13538 transitions. [2021-08-06 20:14:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:14:13,055 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:14:13,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:13,064 INFO L225 Difference]: With dead ends: 7758 [2021-08-06 20:14:13,064 INFO L226 Difference]: Without dead ends: 7749 [2021-08-06 20:14:13,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3508.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1610, Unknown=1, NotChecked=0, Total=1806 [2021-08-06 20:14:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-08-06 20:14:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 5268. [2021-08-06 20:14:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.6798936776153408) internal successors, (8848), 5267 states have internal predecessors, (8848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8848 transitions. [2021-08-06 20:14:13,120 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8848 transitions. Word has length 45 [2021-08-06 20:14:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:13,120 INFO L470 AbstractCegarLoop]: Abstraction has 5268 states and 8848 transitions. [2021-08-06 20:14:13,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:14:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8848 transitions. [2021-08-06 20:14:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:13,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:13,125 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:13,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:13,351 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1244530850, now seen corresponding path program 100 times [2021-08-06 20:14:13,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:13,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614466746] [2021-08-06 20:14:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:13,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:13,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:13,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:13,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:13,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614466746] [2021-08-06 20:14:13,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614466746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:13,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458518728] [2021-08-06 20:14:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:14:13,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:13,683 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:14:16,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:14:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:14:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:17,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 69 treesize of output 68 [2021-08-06 20:14:18,184 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:18,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 82 [2021-08-06 20:14:18,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:18,394 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:18,397 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:14:18,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:14:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458518728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:18,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:14:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034011804] [2021-08-06 20:14:18,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:14:18,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:14:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=422, Unknown=1, NotChecked=0, Total=506 [2021-08-06 20:14:18,462 INFO L87 Difference]: Start difference. First operand 5268 states and 8848 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:14:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:18,923 INFO L93 Difference]: Finished difference Result 7742 states and 13336 transitions. [2021-08-06 20:14:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:14:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 45 [2021-08-06 20:14:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:18,932 INFO L225 Difference]: With dead ends: 7742 [2021-08-06 20:14:18,932 INFO L226 Difference]: Without dead ends: 7733 [2021-08-06 20:14:18,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=83, Invalid=422, Unknown=1, NotChecked=0, Total=506 [2021-08-06 20:14:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2021-08-06 20:14:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 5288. [2021-08-06 20:14:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 1.6845091734442974) internal successors, (8906), 5287 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 8906 transitions. [2021-08-06 20:14:18,986 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 8906 transitions. Word has length 45 [2021-08-06 20:14:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 8906 transitions. [2021-08-06 20:14:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:14:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 8906 transitions. [2021-08-06 20:14:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:18,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:18,991 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:19,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:19,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 20:14:19,215 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1257491358, now seen corresponding path program 101 times [2021-08-06 20:14:19,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:19,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108002719] [2021-08-06 20:14:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:19,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:19,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:19,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:19,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:19,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108002719] [2021-08-06 20:14:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108002719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:19,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397613213] [2021-08-06 20:14:19,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:14:19,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:19,552 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:14:22,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:14:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:14:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:23,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:23,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 78 treesize of output 77 [2021-08-06 20:14:24,817 INFO L354 Elim1Store]: treesize reduction 176, result has 5.4 percent of original size [2021-08-06 20:14:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 20:14:24,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:24,908 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:24,917 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:14:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:24,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397613213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:24,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:24,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 20:14:24,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727524611] [2021-08-06 20:14:24,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:14:24,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:14:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:14:24,971 INFO L87 Difference]: Start difference. First operand 5288 states and 8906 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:14:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:29,914 INFO L93 Difference]: Finished difference Result 7848 states and 13381 transitions. [2021-08-06 20:14:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:14:29,915 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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 45 [2021-08-06 20:14:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:29,924 INFO L225 Difference]: With dead ends: 7848 [2021-08-06 20:14:29,925 INFO L226 Difference]: Without dead ends: 7823 [2021-08-06 20:14:29,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:14:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7823 states. [2021-08-06 20:14:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7823 to 5239. [2021-08-06 20:14:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 5238 states have (on average 1.6764032073310424) internal successors, (8781), 5238 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 8781 transitions. [2021-08-06 20:14:29,981 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 8781 transitions. Word has length 45 [2021-08-06 20:14:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:29,982 INFO L470 AbstractCegarLoop]: Abstraction has 5239 states and 8781 transitions. [2021-08-06 20:14:29,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:14:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 8781 transitions. [2021-08-06 20:14:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:29,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:29,987 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:30,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:30,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:14:30,217 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 282303390, now seen corresponding path program 102 times [2021-08-06 20:14:30,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:30,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843844761] [2021-08-06 20:14:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:30,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:30,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:30,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:30,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:30,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843844761] [2021-08-06 20:14:30,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843844761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:30,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074064706] [2021-08-06 20:14:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:14:30,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:30,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:30,633 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:30,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:14:33,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:14:33,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:14:33,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:34,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 77 treesize of output 76 [2021-08-06 20:14:34,815 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 82 [2021-08-06 20:14:34,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:34,897 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:34,900 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:14:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:14:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:34,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074064706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:34,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:34,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:14:34,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666633286] [2021-08-06 20:14:34,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:14:34,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:14:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:34,970 INFO L87 Difference]: Start difference. First operand 5239 states and 8781 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:14:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:35,464 INFO L93 Difference]: Finished difference Result 8162 states and 13959 transitions. [2021-08-06 20:14:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:14:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 45 [2021-08-06 20:14:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:35,475 INFO L225 Difference]: With dead ends: 8162 [2021-08-06 20:14:35,475 INFO L226 Difference]: Without dead ends: 8153 [2021-08-06 20:14:35,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8153 states. [2021-08-06 20:14:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8153 to 5339. [2021-08-06 20:14:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5338 states have (on average 1.6779692768827277) internal successors, (8957), 5338 states have internal predecessors, (8957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 8957 transitions. [2021-08-06 20:14:35,536 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 8957 transitions. Word has length 45 [2021-08-06 20:14:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:35,536 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 8957 transitions. [2021-08-06 20:14:35,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-08-06 20:14:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 8957 transitions. [2021-08-06 20:14:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:35,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:35,542 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:35,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:35,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 20:14:35,745 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1510641698, now seen corresponding path program 103 times [2021-08-06 20:14:35,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:35,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431125123] [2021-08-06 20:14:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:35,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:35,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:35,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:36,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:36,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431125123] [2021-08-06 20:14:36,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431125123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:36,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096376045] [2021-08-06 20:14:36,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:14:36,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:36,122 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:36,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:14:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:14:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:40,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:40,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 77 treesize of output 76 [2021-08-06 20:14:40,506 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:14:40,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 52 [2021-08-06 20:14:40,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:40,641 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:40,656 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:14:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:40,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096376045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:40,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:40,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:14:40,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255628745] [2021-08-06 20:14:40,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:14:40,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:14:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:40,732 INFO L87 Difference]: Start difference. First operand 5339 states and 8957 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:41,075 INFO L93 Difference]: Finished difference Result 8121 states and 13769 transitions. [2021-08-06 20:14:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:14:41,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 45 [2021-08-06 20:14:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:41,085 INFO L225 Difference]: With dead ends: 8121 [2021-08-06 20:14:41,085 INFO L226 Difference]: Without dead ends: 8096 [2021-08-06 20:14:41,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-08-06 20:14:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 5307. [2021-08-06 20:14:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5306 states have (on average 1.6748963437617792) internal successors, (8887), 5306 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 8887 transitions. [2021-08-06 20:14:41,142 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 8887 transitions. Word has length 45 [2021-08-06 20:14:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:41,142 INFO L470 AbstractCegarLoop]: Abstraction has 5307 states and 8887 transitions. [2021-08-06 20:14:41,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 8887 transitions. [2021-08-06 20:14:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:41,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:41,147 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:41,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 20:14:41,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:41,361 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:41,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1905468446, now seen corresponding path program 104 times [2021-08-06 20:14:41,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:41,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471581179] [2021-08-06 20:14:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:41,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:41,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:41,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:41,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471581179] [2021-08-06 20:14:41,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471581179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:41,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913445823] [2021-08-06 20:14:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:14:41,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:41,736 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:41,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:14:45,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:14:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:14:45,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:45,904 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-06 20:14:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 49 [2021-08-06 20:14:46,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:46,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:14:46,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:46,197 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:14:46,212 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:14:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:46,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913445823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:46,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:46,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:14:46,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519267287] [2021-08-06 20:14:46,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:14:46,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:14:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:46,302 INFO L87 Difference]: Start difference. First operand 5307 states and 8887 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:47,023 INFO L93 Difference]: Finished difference Result 8289 states and 13951 transitions. [2021-08-06 20:14:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:14:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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 45 [2021-08-06 20:14:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:47,034 INFO L225 Difference]: With dead ends: 8289 [2021-08-06 20:14:47,034 INFO L226 Difference]: Without dead ends: 8248 [2021-08-06 20:14:47,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:14:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-08-06 20:14:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 5332. [2021-08-06 20:14:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.6736072031513787) internal successors, (8922), 5331 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 8922 transitions. [2021-08-06 20:14:47,115 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 8922 transitions. Word has length 45 [2021-08-06 20:14:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:47,115 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 8922 transitions. [2021-08-06 20:14:47,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 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) [2021-08-06 20:14:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 8922 transitions. [2021-08-06 20:14:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:47,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:47,120 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:47,342 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1321746786, now seen corresponding path program 105 times [2021-08-06 20:14:47,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:47,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298645154] [2021-08-06 20:14:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:47,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:47,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:47,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:47,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:47,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298645154] [2021-08-06 20:14:47,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298645154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:47,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527570126] [2021-08-06 20:14:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:14:47,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:47,683 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:47,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:14:51,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:14:51,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:14:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:14:52,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:14:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 77 treesize of output 76 [2021-08-06 20:14:53,266 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:14:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 80 [2021-08-06 20:14:53,607 INFO L354 Elim1Store]: treesize reduction 80, result has 59.4 percent of original size [2021-08-06 20:14:53,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 146 [2021-08-06 20:14:53,621 INFO L354 Elim1Store]: treesize reduction 62, result has 11.4 percent of original size [2021-08-06 20:14:53,622 INFO L388 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 122 treesize of output 85 [2021-08-06 20:14:53,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:14:53,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:14:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:53,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527570126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:53,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:14:53,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:14:53,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223037618] [2021-08-06 20:14:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:14:53,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:14:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:14:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=668, Unknown=1, NotChecked=0, Total=756 [2021-08-06 20:14:53,746 INFO L87 Difference]: Start difference. First operand 5332 states and 8922 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:14:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:14:55,072 INFO L93 Difference]: Finished difference Result 7825 states and 13592 transitions. [2021-08-06 20:14:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:14:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:14:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:14:55,082 INFO L225 Difference]: With dead ends: 7825 [2021-08-06 20:14:55,082 INFO L226 Difference]: Without dead ends: 7816 [2021-08-06 20:14:55,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1740.2ms TimeCoverageRelationStatistics Valid=172, Invalid=1549, Unknown=1, NotChecked=0, Total=1722 [2021-08-06 20:14:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7816 states. [2021-08-06 20:14:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7816 to 5483. [2021-08-06 20:14:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5483 states, 5482 states have (on average 1.674388909157242) internal successors, (9179), 5482 states have internal predecessors, (9179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:14:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 9179 transitions. [2021-08-06 20:14:55,173 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 9179 transitions. Word has length 45 [2021-08-06 20:14:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:14:55,173 INFO L470 AbstractCegarLoop]: Abstraction has 5483 states and 9179 transitions. [2021-08-06 20:14:55,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:14:55,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 9179 transitions. [2021-08-06 20:14:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:14:55,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:14:55,179 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:14:55,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 20:14:55,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 20:14:55,397 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:14:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:14:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2060090658, now seen corresponding path program 106 times [2021-08-06 20:14:55,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:14:55,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532315898] [2021-08-06 20:14:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:14:55,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:14:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:14:55,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:55,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:14:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:14:55,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:14:55,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532315898] [2021-08-06 20:14:55,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532315898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:14:55,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010370643] [2021-08-06 20:14:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:14:55,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:14:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:14:55,637 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:14:55,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:14:59,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:14:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:14:59,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:14:59,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:00,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:00,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 67 treesize of output 66 [2021-08-06 20:15:01,094 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:01,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 78 [2021-08-06 20:15:01,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:01,203 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:01,224 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:15:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:15:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:01,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010370643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:01,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:01,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:01,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537505914] [2021-08-06 20:15:01,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:01,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:01,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:01,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=469, Unknown=1, NotChecked=0, Total=552 [2021-08-06 20:15:01,271 INFO L87 Difference]: Start difference. First operand 5483 states and 9179 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-08-06 20:15:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:01,690 INFO L93 Difference]: Finished difference Result 7880 states and 13511 transitions. [2021-08-06 20:15:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 45 [2021-08-06 20:15:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:01,700 INFO L225 Difference]: With dead ends: 7880 [2021-08-06 20:15:01,701 INFO L226 Difference]: Without dead ends: 7871 [2021-08-06 20:15:01,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 830.7ms TimeCoverageRelationStatistics Valid=82, Invalid=469, Unknown=1, NotChecked=0, Total=552 [2021-08-06 20:15:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-08-06 20:15:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5503. [2021-08-06 20:15:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 1.678844056706652) internal successors, (9237), 5502 states have internal predecessors, (9237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 9237 transitions. [2021-08-06 20:15:01,763 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 9237 transitions. Word has length 45 [2021-08-06 20:15:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:01,763 INFO L470 AbstractCegarLoop]: Abstraction has 5503 states and 9237 transitions. [2021-08-06 20:15:01,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-08-06 20:15:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 9237 transitions. [2021-08-06 20:15:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:01,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:01,769 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:01,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:01,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:01,995 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:01,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:01,996 INFO L82 PathProgramCache]: Analyzing trace with hash 441931550, now seen corresponding path program 107 times [2021-08-06 20:15:01,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:01,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169954602] [2021-08-06 20:15:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:01,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:02,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:02,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:02,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:02,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169954602] [2021-08-06 20:15:02,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169954602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:02,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980511527] [2021-08-06 20:15:02,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:02,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:02,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:02,328 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:02,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:15:06,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:15:06,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:15:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:07,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:07,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 67 treesize of output 66 [2021-08-06 20:15:07,790 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:15:07,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 54 [2021-08-06 20:15:07,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:07,914 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:07,930 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:15:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:08,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980511527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:08,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:08,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:08,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079391023] [2021-08-06 20:15:08,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:08,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2021-08-06 20:15:08,007 INFO L87 Difference]: Start difference. First operand 5503 states and 9237 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:08,516 INFO L93 Difference]: Finished difference Result 7861 states and 13393 transitions. [2021-08-06 20:15:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:08,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 45 [2021-08-06 20:15:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:08,524 INFO L225 Difference]: With dead ends: 7861 [2021-08-06 20:15:08,524 INFO L226 Difference]: Without dead ends: 7836 [2021-08-06 20:15:08,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 866.4ms TimeCoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2021-08-06 20:15:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7836 states. [2021-08-06 20:15:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7836 to 5407. [2021-08-06 20:15:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5406 states have (on average 1.677025527192009) internal successors, (9066), 5406 states have internal predecessors, (9066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 9066 transitions. [2021-08-06 20:15:08,578 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 9066 transitions. Word has length 45 [2021-08-06 20:15:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:08,578 INFO L470 AbstractCegarLoop]: Abstraction has 5407 states and 9066 transitions. [2021-08-06 20:15:08,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 9066 transitions. [2021-08-06 20:15:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:08,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:08,584 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:08,809 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash -533256418, now seen corresponding path program 108 times [2021-08-06 20:15:08,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:08,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121478761] [2021-08-06 20:15:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:08,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:08,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:08,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:09,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:09,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121478761] [2021-08-06 20:15:09,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121478761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:09,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835752782] [2021-08-06 20:15:09,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:09,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:09,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:09,026 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:09,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:15:12,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:15:12,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:15:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:13,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:13,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 75 treesize of output 74 [2021-08-06 20:15:13,840 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 78 [2021-08-06 20:15:13,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:13,927 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:13,930 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:15:13,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:15:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835752782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:13,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:13,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:13,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708562697] [2021-08-06 20:15:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:13,977 INFO L87 Difference]: Start difference. First operand 5407 states and 9066 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-08-06 20:15:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:14,403 INFO L93 Difference]: Finished difference Result 7774 states and 13229 transitions. [2021-08-06 20:15:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 45 [2021-08-06 20:15:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:14,412 INFO L225 Difference]: With dead ends: 7774 [2021-08-06 20:15:14,412 INFO L226 Difference]: Without dead ends: 7765 [2021-08-06 20:15:14,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7765 states. [2021-08-06 20:15:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7765 to 5507. [2021-08-06 20:15:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.6785325099891029) internal successors, (9242), 5506 states have internal predecessors, (9242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 9242 transitions. [2021-08-06 20:15:14,521 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 9242 transitions. Word has length 45 [2021-08-06 20:15:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:14,521 INFO L470 AbstractCegarLoop]: Abstraction has 5507 states and 9242 transitions. [2021-08-06 20:15:14,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-08-06 20:15:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 9242 transitions. [2021-08-06 20:15:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:14,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:14,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:14,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:14,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:14,753 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1968765790, now seen corresponding path program 109 times [2021-08-06 20:15:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:14,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117450340] [2021-08-06 20:15:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:14,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:14,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:14,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:15,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:15,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117450340] [2021-08-06 20:15:15,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117450340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:15,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569181978] [2021-08-06 20:15:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:15:15,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:15,125 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:15:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:15:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:19,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:19,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 75 treesize of output 74 [2021-08-06 20:15:20,050 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:15:20,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 54 [2021-08-06 20:15:20,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:20,171 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:20,186 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:20,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:15:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:20,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569181978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:20,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:20,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:20,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453644908] [2021-08-06 20:15:20,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:20,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:20,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:20,269 INFO L87 Difference]: Start difference. First operand 5507 states and 9242 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:20,618 INFO L93 Difference]: Finished difference Result 7761 states and 13093 transitions. [2021-08-06 20:15:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 45 [2021-08-06 20:15:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:20,628 INFO L225 Difference]: With dead ends: 7761 [2021-08-06 20:15:20,628 INFO L226 Difference]: Without dead ends: 7736 [2021-08-06 20:15:20,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2021-08-06 20:15:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 5427. [2021-08-06 20:15:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5427 states, 5426 states have (on average 1.6815333579063767) internal successors, (9124), 5426 states have internal predecessors, (9124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5427 states to 5427 states and 9124 transitions. [2021-08-06 20:15:20,707 INFO L78 Accepts]: Start accepts. Automaton has 5427 states and 9124 transitions. Word has length 45 [2021-08-06 20:15:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 5427 states and 9124 transitions. [2021-08-06 20:15:20,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5427 states and 9124 transitions. [2021-08-06 20:15:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:20,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:20,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:20,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:20,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 20:15:20,927 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:20,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:20,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1089908638, now seen corresponding path program 110 times [2021-08-06 20:15:20,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:20,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726325304] [2021-08-06 20:15:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:20,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:20,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:20,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:21,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:21,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726325304] [2021-08-06 20:15:21,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726325304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:21,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359315501] [2021-08-06 20:15:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:21,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:21,220 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:15:25,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:15:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:25,754 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-06 20:15:25,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 51 [2021-08-06 20:15:25,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:25,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:15:26,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:26,056 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:26,070 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:26,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:15:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:26,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359315501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:26,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:26,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:26,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864907453] [2021-08-06 20:15:26,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:26,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:26,147 INFO L87 Difference]: Start difference. First operand 5427 states and 9124 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:26,870 INFO L93 Difference]: Finished difference Result 8079 states and 13550 transitions. [2021-08-06 20:15:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 45 [2021-08-06 20:15:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:26,879 INFO L225 Difference]: With dead ends: 8079 [2021-08-06 20:15:26,879 INFO L226 Difference]: Without dead ends: 8038 [2021-08-06 20:15:26,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-08-06 20:15:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 5388. [2021-08-06 20:15:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5388 states, 5387 states have (on average 1.6725450157787265) internal successors, (9010), 5387 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 9010 transitions. [2021-08-06 20:15:26,933 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 9010 transitions. Word has length 45 [2021-08-06 20:15:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:26,933 INFO L470 AbstractCegarLoop]: Abstraction has 5388 states and 9010 transitions. [2021-08-06 20:15:26,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 9010 transitions. [2021-08-06 20:15:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:26,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:26,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:26,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 20:15:27,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 20:15:27,152 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:27,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:27,152 INFO L82 PathProgramCache]: Analyzing trace with hash -582177954, now seen corresponding path program 111 times [2021-08-06 20:15:27,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:27,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460348768] [2021-08-06 20:15:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:27,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:27,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:27,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:27,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:27,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460348768] [2021-08-06 20:15:27,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460348768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:27,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650635815] [2021-08-06 20:15:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:27,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:27,512 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:27,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:15:31,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:15:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:15:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:32,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:32,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 85 treesize of output 84 [2021-08-06 20:15:33,112 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-08-06 20:15:33,374 INFO L354 Elim1Store]: treesize reduction 79, result has 59.9 percent of original size [2021-08-06 20:15:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 147 [2021-08-06 20:15:33,397 INFO L354 Elim1Store]: treesize reduction 109, result has 9.9 percent of original size [2021-08-06 20:15:33,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 94 [2021-08-06 20:15:33,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:15:33,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:15:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650635815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:33,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:33,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:15:33,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018686974] [2021-08-06 20:15:33,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:15:33,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:15:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:15:33,518 INFO L87 Difference]: Start difference. First operand 5388 states and 9010 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:15:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:35,344 INFO L93 Difference]: Finished difference Result 7977 states and 13587 transitions. [2021-08-06 20:15:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:15:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:15:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:35,354 INFO L225 Difference]: With dead ends: 7977 [2021-08-06 20:15:35,354 INFO L226 Difference]: Without dead ends: 7968 [2021-08-06 20:15:35,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1497.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:15:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-08-06 20:15:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 5537. [2021-08-06 20:15:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5537 states, 5536 states have (on average 1.673229768786127) internal successors, (9263), 5536 states have internal predecessors, (9263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5537 states to 5537 states and 9263 transitions. [2021-08-06 20:15:35,449 INFO L78 Accepts]: Start accepts. Automaton has 5537 states and 9263 transitions. Word has length 45 [2021-08-06 20:15:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 5537 states and 9263 transitions. [2021-08-06 20:15:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:15:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5537 states and 9263 transitions. [2021-08-06 20:15:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:35,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:35,455 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:35,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:35,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:15:35,673 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1919844254, now seen corresponding path program 112 times [2021-08-06 20:15:35,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28630888] [2021-08-06 20:15:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:35,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:35,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:35,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:36,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:36,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28630888] [2021-08-06 20:15:36,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28630888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:36,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141107577] [2021-08-06 20:15:36,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:36,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:36,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:36,022 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:36,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:15:39,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:39,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:15:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:40,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:40,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 75 treesize of output 74 [2021-08-06 20:15:40,988 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-06 20:15:40,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-08-06 20:15:41,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:41,119 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:41,135 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:15:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:41,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141107577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:41,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:41,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:15:41,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497962662] [2021-08-06 20:15:41,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:15:41,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:15:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:41,215 INFO L87 Difference]: Start difference. First operand 5537 states and 9263 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:41,778 INFO L93 Difference]: Finished difference Result 7955 states and 13402 transitions. [2021-08-06 20:15:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:15:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 45 [2021-08-06 20:15:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:41,788 INFO L225 Difference]: With dead ends: 7955 [2021-08-06 20:15:41,788 INFO L226 Difference]: Without dead ends: 7930 [2021-08-06 20:15:41,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:15:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7930 states. [2021-08-06 20:15:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7930 to 5461. [2021-08-06 20:15:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5461 states, 5460 states have (on average 1.6758241758241759) internal successors, (9150), 5460 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 9150 transitions. [2021-08-06 20:15:41,847 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 9150 transitions. Word has length 45 [2021-08-06 20:15:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:41,847 INFO L470 AbstractCegarLoop]: Abstraction has 5461 states and 9150 transitions. [2021-08-06 20:15:41,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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) [2021-08-06 20:15:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 9150 transitions. [2021-08-06 20:15:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:41,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:41,852 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:41,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:42,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 20:15:42,058 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1040987102, now seen corresponding path program 113 times [2021-08-06 20:15:42,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:42,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857431060] [2021-08-06 20:15:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:42,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:42,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:42,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:42,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:42,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857431060] [2021-08-06 20:15:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857431060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:42,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340515546] [2021-08-06 20:15:42,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:42,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:42,347 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:42,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:15:46,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:15:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:15:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:47,498 INFO L354 Elim1Store]: treesize reduction 176, result has 5.4 percent of original size [2021-08-06 20:15:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 66 [2021-08-06 20:15:47,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:15:47,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:15:47,787 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:15:47,802 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:15:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:15:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340515546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:47,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:47,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 20:15:47,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453720799] [2021-08-06 20:15:47,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:15:47,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:15:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:15:47,873 INFO L87 Difference]: Start difference. First operand 5461 states and 9150 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:15:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:56,060 INFO L93 Difference]: Finished difference Result 8468 states and 14192 transitions. [2021-08-06 20:15:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:15:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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 45 [2021-08-06 20:15:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:56,072 INFO L225 Difference]: With dead ends: 8468 [2021-08-06 20:15:56,072 INFO L226 Difference]: Without dead ends: 8427 [2021-08-06 20:15:56,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:15:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-08-06 20:15:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 5442. [2021-08-06 20:15:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5442 states, 5441 states have (on average 1.671383936776328) internal successors, (9094), 5441 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5442 states to 5442 states and 9094 transitions. [2021-08-06 20:15:56,131 INFO L78 Accepts]: Start accepts. Automaton has 5442 states and 9094 transitions. Word has length 45 [2021-08-06 20:15:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:56,131 INFO L470 AbstractCegarLoop]: Abstraction has 5442 states and 9094 transitions. [2021-08-06 20:15:56,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:15:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5442 states and 9094 transitions. [2021-08-06 20:15:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:15:56,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:56,136 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:56,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:56,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:56,349 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:15:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -550123490, now seen corresponding path program 114 times [2021-08-06 20:15:56,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:56,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809125318] [2021-08-06 20:15:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:56,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:56,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:56,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:15:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:56,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:56,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809125318] [2021-08-06 20:15:56,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809125318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:56,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333773251] [2021-08-06 20:15:56,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:56,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:56,656 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:15:56,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:16:00,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:16:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:16:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:01,031 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:16:01,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 37 [2021-08-06 20:16:01,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:01,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:16:01,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:01,397 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:16:01,413 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:16:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:01,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333773251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:01,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:01,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:16:01,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43755084] [2021-08-06 20:16:01,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:16:01,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:16:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:16:01,494 INFO L87 Difference]: Start difference. First operand 5442 states and 9094 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:02,098 INFO L93 Difference]: Finished difference Result 7499 states and 12512 transitions. [2021-08-06 20:16:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:16:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:16:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:02,106 INFO L225 Difference]: With dead ends: 7499 [2021-08-06 20:16:02,106 INFO L226 Difference]: Without dead ends: 7458 [2021-08-06 20:16:02,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:16:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2021-08-06 20:16:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 5488. [2021-08-06 20:16:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 1.6701293967559687) internal successors, (9164), 5487 states have internal predecessors, (9164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 9164 transitions. [2021-08-06 20:16:02,157 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 9164 transitions. Word has length 45 [2021-08-06 20:16:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:02,157 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 9164 transitions. [2021-08-06 20:16:02,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 9164 transitions. [2021-08-06 20:16:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:02,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:02,162 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:02,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:02,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:02,372 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1598442620, now seen corresponding path program 115 times [2021-08-06 20:16:02,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:02,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419235912] [2021-08-06 20:16:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:02,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:02,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:02,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:02,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:02,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419235912] [2021-08-06 20:16:02,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419235912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:02,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771378259] [2021-08-06 20:16:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:02,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:02,642 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:02,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:16:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:06,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:16:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:08,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:08,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 73 treesize of output 72 [2021-08-06 20:16:08,785 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 76 [2021-08-06 20:16:09,124 INFO L354 Elim1Store]: treesize reduction 51, result has 55.3 percent of original size [2021-08-06 20:16:09,125 INFO L388 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 60 treesize of output 81 [2021-08-06 20:16:09,135 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:16:09,135 INFO L388 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 69 treesize of output 49 [2021-08-06 20:16:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:09,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771378259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:09,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:09,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:16:09,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134219138] [2021-08-06 20:16:09,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:09,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=528, Unknown=1, NotChecked=0, Total=600 [2021-08-06 20:16:09,206 INFO L87 Difference]: Start difference. First operand 5488 states and 9164 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:09,847 INFO L93 Difference]: Finished difference Result 8056 states and 14026 transitions. [2021-08-06 20:16:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:16:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 45 [2021-08-06 20:16:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:09,857 INFO L225 Difference]: With dead ends: 8056 [2021-08-06 20:16:09,858 INFO L226 Difference]: Without dead ends: 8029 [2021-08-06 20:16:09,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1397.0ms TimeCoverageRelationStatistics Valid=76, Invalid=573, Unknown=1, NotChecked=0, Total=650 [2021-08-06 20:16:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-08-06 20:16:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 5649. [2021-08-06 20:16:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5649 states, 5648 states have (on average 1.674929178470255) internal successors, (9460), 5648 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 9460 transitions. [2021-08-06 20:16:09,917 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 9460 transitions. Word has length 45 [2021-08-06 20:16:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:09,917 INFO L470 AbstractCegarLoop]: Abstraction has 5649 states and 9460 transitions. [2021-08-06 20:16:09,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 9460 transitions. [2021-08-06 20:16:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:09,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:09,922 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:09,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:10,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 20:16:10,149 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 292396804, now seen corresponding path program 116 times [2021-08-06 20:16:10,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:10,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547385705] [2021-08-06 20:16:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:10,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:10,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:10,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:10,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:10,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547385705] [2021-08-06 20:16:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547385705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:10,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393526032] [2021-08-06 20:16:10,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:10,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:10,495 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:10,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:16:14,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:16:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:16,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:16,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 73 treesize of output 72 [2021-08-06 20:16:17,339 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:17,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 87 [2021-08-06 20:16:19,701 INFO L354 Elim1Store]: treesize reduction 51, result has 55.3 percent of original size [2021-08-06 20:16:19,701 INFO L388 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 60 treesize of output 81 [2021-08-06 20:16:19,711 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:16:19,711 INFO L388 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 69 treesize of output 49 [2021-08-06 20:16:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393526032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:19,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:19,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:16:19,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220888833] [2021-08-06 20:16:19,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:19,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=520, Unknown=1, NotChecked=0, Total=600 [2021-08-06 20:16:19,776 INFO L87 Difference]: Start difference. First operand 5649 states and 9460 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:20,637 INFO L93 Difference]: Finished difference Result 8283 states and 14181 transitions. [2021-08-06 20:16:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:16:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 45 [2021-08-06 20:16:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:20,648 INFO L225 Difference]: With dead ends: 8283 [2021-08-06 20:16:20,648 INFO L226 Difference]: Without dead ends: 8256 [2021-08-06 20:16:20,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3248.3ms TimeCoverageRelationStatistics Valid=84, Invalid=565, Unknown=1, NotChecked=0, Total=650 [2021-08-06 20:16:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2021-08-06 20:16:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 5685. [2021-08-06 20:16:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5685 states, 5684 states have (on average 1.675932441942294) internal successors, (9526), 5684 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5685 states to 5685 states and 9526 transitions. [2021-08-06 20:16:20,711 INFO L78 Accepts]: Start accepts. Automaton has 5685 states and 9526 transitions. Word has length 45 [2021-08-06 20:16:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:20,711 INFO L470 AbstractCegarLoop]: Abstraction has 5685 states and 9526 transitions. [2021-08-06 20:16:20,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5685 states and 9526 transitions. [2021-08-06 20:16:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:20,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:20,716 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:20,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:20,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:20,945 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1500548284, now seen corresponding path program 117 times [2021-08-06 20:16:20,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:20,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433721219] [2021-08-06 20:16:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:20,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:20,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:20,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:21,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433721219] [2021-08-06 20:16:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433721219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:21,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407612340] [2021-08-06 20:16:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:16:21,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:21,258 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:21,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:16:25,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:16:25,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:16:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:27,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 77 treesize of output 76 [2021-08-06 20:16:28,665 INFO L354 Elim1Store]: treesize reduction 109, result has 9.9 percent of original size [2021-08-06 20:16:28,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 79 [2021-08-06 20:16:29,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:29,215 INFO L388 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 64 treesize of output 122 [2021-08-06 20:16:29,231 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:29,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 106 [2021-08-06 20:16:29,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:16:29,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:16:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407612340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:29,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:29,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:16:29,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299252345] [2021-08-06 20:16:29,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:16:29,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:16:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=663, Unknown=1, NotChecked=0, Total=756 [2021-08-06 20:16:29,437 INFO L87 Difference]: Start difference. First operand 5685 states and 9526 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:16:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:32,623 INFO L93 Difference]: Finished difference Result 8829 states and 14989 transitions. [2021-08-06 20:16:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:16:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:16:32,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:32,764 INFO L225 Difference]: With dead ends: 8829 [2021-08-06 20:16:32,764 INFO L226 Difference]: Without dead ends: 8778 [2021-08-06 20:16:32,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2089.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1933, Unknown=1, NotChecked=0, Total=2162 [2021-08-06 20:16:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2021-08-06 20:16:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 5645. [2021-08-06 20:16:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5645 states, 5644 states have (on average 1.67611622962438) internal successors, (9460), 5644 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5645 states to 5645 states and 9460 transitions. [2021-08-06 20:16:32,821 INFO L78 Accepts]: Start accepts. Automaton has 5645 states and 9460 transitions. Word has length 45 [2021-08-06 20:16:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:32,821 INFO L470 AbstractCegarLoop]: Abstraction has 5645 states and 9460 transitions. [2021-08-06 20:16:32,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:16:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5645 states and 9460 transitions. [2021-08-06 20:16:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:32,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:32,827 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:32,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 20:16:33,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:33,052 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -415249788, now seen corresponding path program 118 times [2021-08-06 20:16:33,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:33,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503007879] [2021-08-06 20:16:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:33,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:33,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:33,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:33,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:33,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503007879] [2021-08-06 20:16:33,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503007879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:33,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806079852] [2021-08-06 20:16:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:33,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:33,395 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:33,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 20:16:37,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:16:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:38,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 83 [2021-08-06 20:16:39,398 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 87 [2021-08-06 20:16:39,678 INFO L354 Elim1Store]: treesize reduction 54, result has 52.6 percent of original size [2021-08-06 20:16:39,678 INFO L388 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 60 treesize of output 78 [2021-08-06 20:16:39,682 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:16:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:16:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:39,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806079852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:39,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:39,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:16:39,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872978531] [2021-08-06 20:16:39,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:39,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:39,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:39,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:16:39,737 INFO L87 Difference]: Start difference. First operand 5645 states and 9460 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:40,174 INFO L93 Difference]: Finished difference Result 8343 states and 14201 transitions. [2021-08-06 20:16:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:16:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 45 [2021-08-06 20:16:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:40,184 INFO L225 Difference]: With dead ends: 8343 [2021-08-06 20:16:40,185 INFO L226 Difference]: Without dead ends: 8316 [2021-08-06 20:16:40,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:16:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8316 states. [2021-08-06 20:16:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8316 to 5735. [2021-08-06 20:16:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5735 states, 5734 states have (on average 1.6766655040111615) internal successors, (9614), 5734 states have internal predecessors, (9614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5735 states to 5735 states and 9614 transitions. [2021-08-06 20:16:40,245 INFO L78 Accepts]: Start accepts. Automaton has 5735 states and 9614 transitions. Word has length 45 [2021-08-06 20:16:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:40,245 INFO L470 AbstractCegarLoop]: Abstraction has 5735 states and 9614 transitions. [2021-08-06 20:16:40,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:16:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5735 states and 9614 transitions. [2021-08-06 20:16:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:40,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:40,250 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:40,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:40,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:40,465 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2086772420, now seen corresponding path program 119 times [2021-08-06 20:16:40,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:40,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530126335] [2021-08-06 20:16:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:40,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:40,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:40,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:40,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:40,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530126335] [2021-08-06 20:16:40,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530126335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:40,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803803047] [2021-08-06 20:16:40,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:40,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:40,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:40,785 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:40,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 20:16:45,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:16:45,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:16:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:46,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 83 [2021-08-06 20:16:46,833 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:16:46,834 INFO L388 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 63 [2021-08-06 20:16:47,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:47,007 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:16:47,024 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:16:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803803047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:47,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:47,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:16:47,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249043211] [2021-08-06 20:16:47,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:47,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:47,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:16:47,100 INFO L87 Difference]: Start difference. First operand 5735 states and 9614 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:16:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:47,792 INFO L93 Difference]: Finished difference Result 8481 states and 14336 transitions. [2021-08-06 20:16:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:16:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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 45 [2021-08-06 20:16:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:47,803 INFO L225 Difference]: With dead ends: 8481 [2021-08-06 20:16:47,804 INFO L226 Difference]: Without dead ends: 8430 [2021-08-06 20:16:47,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:16:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2021-08-06 20:16:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 5681. [2021-08-06 20:16:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5680 states have (on average 1.677112676056338) internal successors, (9526), 5680 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 9526 transitions. [2021-08-06 20:16:47,872 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 9526 transitions. Word has length 45 [2021-08-06 20:16:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:47,872 INFO L470 AbstractCegarLoop]: Abstraction has 5681 states and 9526 transitions. [2021-08-06 20:16:47,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:16:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 9526 transitions. [2021-08-06 20:16:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:47,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:47,879 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:47,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 20:16:48,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:48,086 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1207915268, now seen corresponding path program 120 times [2021-08-06 20:16:48,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:48,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713206999] [2021-08-06 20:16:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:48,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:48,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:48,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:48,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:48,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713206999] [2021-08-06 20:16:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713206999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:48,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243839537] [2021-08-06 20:16:48,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:48,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:48,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:48,369 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:48,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 20:16:53,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:16:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:16:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:53,896 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:16:53,897 INFO L388 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 80 treesize of output 60 [2021-08-06 20:16:54,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:54,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:16:54,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:16:54,159 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:16:54,171 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:16:54,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:16:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:54,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243839537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:54,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:54,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:16:54,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419491370] [2021-08-06 20:16:54,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:54,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:16:54,245 INFO L87 Difference]: Start difference. First operand 5681 states and 9526 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:16:54,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:54,838 INFO L93 Difference]: Finished difference Result 8709 states and 14610 transitions. [2021-08-06 20:16:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:16:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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 45 [2021-08-06 20:16:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:54,850 INFO L225 Difference]: With dead ends: 8709 [2021-08-06 20:16:54,850 INFO L226 Difference]: Without dead ends: 8643 [2021-08-06 20:16:54,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:16:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8643 states. [2021-08-06 20:16:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8643 to 5675. [2021-08-06 20:16:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5675 states, 5674 states have (on average 1.675185054635178) internal successors, (9505), 5674 states have internal predecessors, (9505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 9505 transitions. [2021-08-06 20:16:54,913 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 9505 transitions. Word has length 45 [2021-08-06 20:16:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:54,913 INFO L470 AbstractCegarLoop]: Abstraction has 5675 states and 9505 transitions. [2021-08-06 20:16:54,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:16:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 9505 transitions. [2021-08-06 20:16:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:16:54,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:54,918 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:54,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:55,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 20:16:55,133 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:16:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:55,133 INFO L82 PathProgramCache]: Analyzing trace with hash -384813564, now seen corresponding path program 121 times [2021-08-06 20:16:55,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:55,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153120453] [2021-08-06 20:16:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:55,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:55,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:55,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:16:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:55,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:55,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153120453] [2021-08-06 20:16:55,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153120453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:55,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977760228] [2021-08-06 20:16:55,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:55,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:55,432 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:16:55,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 20:17:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:17:00,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:01,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:01,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 83 [2021-08-06 20:17:01,565 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:01,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 87 [2021-08-06 20:17:01,782 INFO L354 Elim1Store]: treesize reduction 54, result has 55.0 percent of original size [2021-08-06 20:17:01,782 INFO L388 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 62 treesize of output 84 [2021-08-06 20:17:01,787 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-06 20:17:01,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 46 [2021-08-06 20:17:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:01,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977760228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:01,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:01,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:17:01,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742601138] [2021-08-06 20:17:01,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:17:01,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:17:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:17:01,844 INFO L87 Difference]: Start difference. First operand 5675 states and 9505 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:17:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:02,264 INFO L93 Difference]: Finished difference Result 8147 states and 13842 transitions. [2021-08-06 20:17:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:17:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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 45 [2021-08-06 20:17:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:02,274 INFO L225 Difference]: With dead ends: 8147 [2021-08-06 20:17:02,274 INFO L226 Difference]: Without dead ends: 8124 [2021-08-06 20:17:02,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:17:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8124 states. [2021-08-06 20:17:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8124 to 5809. [2021-08-06 20:17:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 1.6754476584022038) internal successors, (9731), 5808 states have internal predecessors, (9731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 9731 transitions. [2021-08-06 20:17:02,336 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 9731 transitions. Word has length 45 [2021-08-06 20:17:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 5809 states and 9731 transitions. [2021-08-06 20:17:02,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 24 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) [2021-08-06 20:17:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 9731 transitions. [2021-08-06 20:17:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:02,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:02,342 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:02,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:02,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 20:17:02,569 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2117208644, now seen corresponding path program 122 times [2021-08-06 20:17:02,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:02,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479507784] [2021-08-06 20:17:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:02,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:02,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:02,597 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:02,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:02,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479507784] [2021-08-06 20:17:02,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479507784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:02,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140919447] [2021-08-06 20:17:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:17:02,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:02,885 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:02,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 20:17:07,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:17:07,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:07,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:17:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:08,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:08,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 83 [2021-08-06 20:17:09,135 INFO L354 Elim1Store]: treesize reduction 73, result has 3.9 percent of original size [2021-08-06 20:17:09,135 INFO L388 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 85 treesize of output 63 [2021-08-06 20:17:09,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:09,270 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:17:09,287 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:17:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:09,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140919447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:09,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:09,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-08-06 20:17:09,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617420734] [2021-08-06 20:17:09,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:17:09,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:17:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:17:09,367 INFO L87 Difference]: Start difference. First operand 5809 states and 9731 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:17:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:09,859 INFO L93 Difference]: Finished difference Result 8305 states and 14012 transitions. [2021-08-06 20:17:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:17:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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 45 [2021-08-06 20:17:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:09,870 INFO L225 Difference]: With dead ends: 8305 [2021-08-06 20:17:09,870 INFO L226 Difference]: Without dead ends: 8258 [2021-08-06 20:17:09,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:17:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8258 states. [2021-08-06 20:17:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8258 to 5741. [2021-08-06 20:17:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5741 states, 5740 states have (on average 1.6777003484320558) internal successors, (9630), 5740 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5741 states to 5741 states and 9630 transitions. [2021-08-06 20:17:09,933 INFO L78 Accepts]: Start accepts. Automaton has 5741 states and 9630 transitions. Word has length 45 [2021-08-06 20:17:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:09,933 INFO L470 AbstractCegarLoop]: Abstraction has 5741 states and 9630 transitions. [2021-08-06 20:17:09,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 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) [2021-08-06 20:17:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5741 states and 9630 transitions. [2021-08-06 20:17:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:09,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:09,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:09,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:10,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:10,155 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1238351492, now seen corresponding path program 123 times [2021-08-06 20:17:10,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:10,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909674106] [2021-08-06 20:17:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:10,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:10,183 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:10,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:10,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:10,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909674106] [2021-08-06 20:17:10,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909674106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:10,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581789601] [2021-08-06 20:17:10,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:17:10,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:10,456 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:10,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:17:15,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:17:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:17:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:16,364 INFO L354 Elim1Store]: treesize reduction 109, result has 9.9 percent of original size [2021-08-06 20:17:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 76 [2021-08-06 20:17:16,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 65 treesize of output 64 [2021-08-06 20:17:17,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:17,447 INFO L388 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 64 treesize of output 122 [2021-08-06 20:17:17,462 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 106 [2021-08-06 20:17:17,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:17:17,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:17:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581789601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:17,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:17,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:17:17,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050474867] [2021-08-06 20:17:17,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:17:17,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:17,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:17:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:17:17,642 INFO L87 Difference]: Start difference. First operand 5741 states and 9630 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:17:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:18,957 INFO L93 Difference]: Finished difference Result 9612 states and 16121 transitions. [2021-08-06 20:17:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:17:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:17:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:18,969 INFO L225 Difference]: With dead ends: 9612 [2021-08-06 20:17:18,969 INFO L226 Difference]: Without dead ends: 9550 [2021-08-06 20:17:18,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:17:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9550 states. [2021-08-06 20:17:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9550 to 5724. [2021-08-06 20:17:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5723 states have (on average 1.6744714310676219) internal successors, (9583), 5723 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 9583 transitions. [2021-08-06 20:17:19,036 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 9583 transitions. Word has length 45 [2021-08-06 20:17:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:19,036 INFO L470 AbstractCegarLoop]: Abstraction has 5724 states and 9583 transitions. [2021-08-06 20:17:19,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:17:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 9583 transitions. [2021-08-06 20:17:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:19,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:19,042 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:19,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:19,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 20:17:19,257 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash -352759100, now seen corresponding path program 124 times [2021-08-06 20:17:19,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:19,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680226505] [2021-08-06 20:17:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:19,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:19,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:19,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:19,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:19,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680226505] [2021-08-06 20:17:19,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680226505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:19,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642416069] [2021-08-06 20:17:19,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:17:19,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:19,548 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:19,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:17:24,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:17:24,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:17:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:25,203 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:17:25,203 INFO L388 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 66 treesize of output 46 [2021-08-06 20:17:25,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:25,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:17:25,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:25,510 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:17:25,523 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:25,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:17:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:25,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642416069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:25,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:25,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:17:25,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006080796] [2021-08-06 20:17:25,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:17:25,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:17:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:17:25,600 INFO L87 Difference]: Start difference. First operand 5724 states and 9583 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:17:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:26,101 INFO L93 Difference]: Finished difference Result 8219 states and 13664 transitions. [2021-08-06 20:17:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:17:26,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 45 [2021-08-06 20:17:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:26,112 INFO L225 Difference]: With dead ends: 8219 [2021-08-06 20:17:26,112 INFO L226 Difference]: Without dead ends: 8169 [2021-08-06 20:17:26,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:17:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-08-06 20:17:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 5750. [2021-08-06 20:17:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 1.6743781527222126) internal successors, (9626), 5749 states have internal predecessors, (9626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 9626 transitions. [2021-08-06 20:17:26,179 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 9626 transitions. Word has length 45 [2021-08-06 20:17:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:26,180 INFO L470 AbstractCegarLoop]: Abstraction has 5750 states and 9626 transitions. [2021-08-06 20:17:26,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:17:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 9626 transitions. [2021-08-06 20:17:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:26,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:26,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:26,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 20:17:26,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 20:17:26,413 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1334807740, now seen corresponding path program 125 times [2021-08-06 20:17:26,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:26,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991170280] [2021-08-06 20:17:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:26,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:26,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:26,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:26,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:26,565 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:26,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:26,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991170280] [2021-08-06 20:17:26,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991170280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:26,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10235452] [2021-08-06 20:17:26,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:17:26,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:26,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:26,695 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:26,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:17:31,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:17:31,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:17:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:33,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:33,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 89 treesize of output 88 [2021-08-06 20:17:34,405 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 92 [2021-08-06 20:17:34,810 INFO L354 Elim1Store]: treesize reduction 124, result has 33.0 percent of original size [2021-08-06 20:17:34,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 89 [2021-08-06 20:17:34,835 INFO L354 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2021-08-06 20:17:34,835 INFO L388 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 66 treesize of output 70 [2021-08-06 20:17:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10235452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:34,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:34,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-06 20:17:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58182699] [2021-08-06 20:17:34,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:17:34,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:17:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:17:34,948 INFO L87 Difference]: Start difference. First operand 5750 states and 9626 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:17:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:36,424 INFO L93 Difference]: Finished difference Result 7984 states and 13567 transitions. [2021-08-06 20:17:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:17:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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 45 [2021-08-06 20:17:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:36,433 INFO L225 Difference]: With dead ends: 7984 [2021-08-06 20:17:36,433 INFO L226 Difference]: Without dead ends: 7961 [2021-08-06 20:17:36,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 662.8ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:17:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-08-06 20:17:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 5878. [2021-08-06 20:17:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 1.676025182916454) internal successors, (9850), 5877 states have internal predecessors, (9850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 9850 transitions. [2021-08-06 20:17:36,488 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 9850 transitions. Word has length 45 [2021-08-06 20:17:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:36,488 INFO L470 AbstractCegarLoop]: Abstraction has 5878 states and 9850 transitions. [2021-08-06 20:17:36,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:17:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 9850 transitions. [2021-08-06 20:17:36,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:36,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:36,493 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:36,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:36,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 20:17:36,713 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 740900548, now seen corresponding path program 126 times [2021-08-06 20:17:36,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:36,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544433204] [2021-08-06 20:17:36,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:36,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:36,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:36,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:36,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:36,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:37,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:37,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544433204] [2021-08-06 20:17:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544433204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:37,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079006552] [2021-08-06 20:17:37,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:17:37,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:37,101 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:37,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:17:42,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:17:42,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:17:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:17:42,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:43,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 85 treesize of output 84 [2021-08-06 20:17:44,159 INFO L354 Elim1Store]: treesize reduction 117, result has 9.3 percent of original size [2021-08-06 20:17:44,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 79 [2021-08-06 20:17:44,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:44,692 INFO L388 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 64 treesize of output 122 [2021-08-06 20:17:44,708 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 106 [2021-08-06 20:17:44,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:17:44,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:17:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:44,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079006552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:44,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:44,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-06 20:17:44,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631040662] [2021-08-06 20:17:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:17:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:17:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:17:44,904 INFO L87 Difference]: Start difference. First operand 5878 states and 9850 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:17:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:46,851 INFO L93 Difference]: Finished difference Result 8631 states and 14528 transitions. [2021-08-06 20:17:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:17:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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 45 [2021-08-06 20:17:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:46,862 INFO L225 Difference]: With dead ends: 8631 [2021-08-06 20:17:46,862 INFO L226 Difference]: Without dead ends: 8584 [2021-08-06 20:17:46,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1099.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 20:17:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8584 states. [2021-08-06 20:17:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8584 to 5814. [2021-08-06 20:17:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5814 states, 5813 states have (on average 1.677963185962498) internal successors, (9754), 5813 states have internal predecessors, (9754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 9754 transitions. [2021-08-06 20:17:46,932 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 9754 transitions. Word has length 45 [2021-08-06 20:17:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:46,932 INFO L470 AbstractCegarLoop]: Abstraction has 5814 states and 9754 transitions. [2021-08-06 20:17:46,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 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) [2021-08-06 20:17:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 9754 transitions. [2021-08-06 20:17:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:46,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:46,939 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:46,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:47,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 20:17:47,162 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1066420804, now seen corresponding path program 127 times [2021-08-06 20:17:47,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:47,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930424851] [2021-08-06 20:17:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:47,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:47,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:47,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:47,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:47,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:47,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930424851] [2021-08-06 20:17:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930424851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927506882] [2021-08-06 20:17:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:17:47,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:47,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:47,473 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:47,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:17:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:17:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:17:53,956 INFO L354 Elim1Store]: treesize reduction 122, result has 5.4 percent of original size [2021-08-06 20:17:53,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 70 [2021-08-06 20:17:54,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:17:54,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:17:54,238 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:17:54,253 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:17:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:17:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927506882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:54,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:17:54,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 20:17:54,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442105807] [2021-08-06 20:17:54,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:17:54,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:17:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:17:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:17:54,332 INFO L87 Difference]: Start difference. First operand 5814 states and 9754 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:17:54,944 INFO L93 Difference]: Finished difference Result 8256 states and 13799 transitions. [2021-08-06 20:17:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:17:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:17:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:17:54,953 INFO L225 Difference]: With dead ends: 8256 [2021-08-06 20:17:54,954 INFO L226 Difference]: Without dead ends: 8194 [2021-08-06 20:17:54,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:17:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8194 states. [2021-08-06 20:17:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8194 to 5771. [2021-08-06 20:17:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 5770 states have (on average 1.677989601386482) internal successors, (9682), 5770 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:55,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 9682 transitions. [2021-08-06 20:17:55,020 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 9682 transitions. Word has length 45 [2021-08-06 20:17:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:17:55,020 INFO L470 AbstractCegarLoop]: Abstraction has 5771 states and 9682 transitions. [2021-08-06 20:17:55,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:17:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 9682 transitions. [2021-08-06 20:17:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:17:55,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:17:55,026 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:17:55,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 20:17:55,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:55,241 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:17:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:17:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash -377121340, now seen corresponding path program 128 times [2021-08-06 20:17:55,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:17:55,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680589440] [2021-08-06 20:17:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:17:55,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:17:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:17:55,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:55,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:17:55,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:55,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:17:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:17:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:17:55,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680589440] [2021-08-06 20:17:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680589440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:17:55,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240138540] [2021-08-06 20:17:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:17:55,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:17:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:17:55,503 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:17:55,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:18:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:18:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 20:18:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:01,732 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-08-06 20:18:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 56 [2021-08-06 20:18:01,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:18:01,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 52 treesize of output 51 [2021-08-06 20:18:02,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:18:02,105 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:18:02,121 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:18:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:18:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:02,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240138540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:02,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:02,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-08-06 20:18:02,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073863678] [2021-08-06 20:18:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:18:02,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:18:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:18:02,202 INFO L87 Difference]: Start difference. First operand 5771 states and 9682 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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) [2021-08-06 20:18:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:02,953 INFO L93 Difference]: Finished difference Result 7828 states and 12987 transitions. [2021-08-06 20:18:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:18:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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 45 [2021-08-06 20:18:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:02,965 INFO L225 Difference]: With dead ends: 7828 [2021-08-06 20:18:02,965 INFO L226 Difference]: Without dead ends: 7778 [2021-08-06 20:18:02,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:18:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7778 states. [2021-08-06 20:18:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7778 to 5762. [2021-08-06 20:18:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 1.6752299947925708) internal successors, (9651), 5761 states have internal predecessors, (9651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 9651 transitions. [2021-08-06 20:18:03,033 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 9651 transitions. Word has length 45 [2021-08-06 20:18:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:03,033 INFO L470 AbstractCegarLoop]: Abstraction has 5762 states and 9651 transitions. [2021-08-06 20:18:03,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 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) [2021-08-06 20:18:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 9651 transitions. [2021-08-06 20:18:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:03,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:03,041 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:03,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:03,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:03,257 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1326137438, now seen corresponding path program 129 times [2021-08-06 20:18:03,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:03,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609453279] [2021-08-06 20:18:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:03,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:03,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:03,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:03,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609453279] [2021-08-06 20:18:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609453279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:03,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609317618] [2021-08-06 20:18:03,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:18:03,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:03,571 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:03,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:18:08,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:18:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:18:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:10,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:18:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 55 [2021-08-06 20:18:12,843 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:18:12,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 66 [2021-08-06 20:18:13,203 INFO L354 Elim1Store]: treesize reduction 77, result has 60.9 percent of original size [2021-08-06 20:18:13,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 149 [2021-08-06 20:18:13,219 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-08-06 20:18:13,219 INFO L388 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 131 treesize of output 91 [2021-08-06 20:18:13,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:18:13,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:18:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:13,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609317618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:13,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:13,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:18:13,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638813179] [2021-08-06 20:18:13,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:18:13,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:18:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=671, Unknown=2, NotChecked=0, Total=756 [2021-08-06 20:18:13,344 INFO L87 Difference]: Start difference. First operand 5762 states and 9651 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:18:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:43,257 INFO L93 Difference]: Finished difference Result 7416 states and 12788 transitions. [2021-08-06 20:18:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:18:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:18:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:43,267 INFO L225 Difference]: With dead ends: 7416 [2021-08-06 20:18:43,267 INFO L226 Difference]: Without dead ends: 7377 [2021-08-06 20:18:43,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 8210.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1703, Unknown=5, NotChecked=0, Total=1892 [2021-08-06 20:18:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-08-06 20:18:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 5887. [2021-08-06 20:18:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5887 states, 5886 states have (on average 1.676520557254502) internal successors, (9868), 5886 states have internal predecessors, (9868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5887 states to 5887 states and 9868 transitions. [2021-08-06 20:18:43,326 INFO L78 Accepts]: Start accepts. Automaton has 5887 states and 9868 transitions. Word has length 45 [2021-08-06 20:18:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:43,327 INFO L470 AbstractCegarLoop]: Abstraction has 5887 states and 9868 transitions. [2021-08-06 20:18:43,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:18:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5887 states and 9868 transitions. [2021-08-06 20:18:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:43,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:43,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:43,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-06 20:18:43,554 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:43,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1544111262, now seen corresponding path program 130 times [2021-08-06 20:18:43,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:43,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576414055] [2021-08-06 20:18:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:43,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:43,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:43,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:43,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:43,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576414055] [2021-08-06 20:18:43,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576414055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:43,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796354818] [2021-08-06 20:18:43,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:18:43,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:43,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:43,860 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:43,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:18:49,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:18:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:18:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:49,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:18:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:18:51,301 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:18:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 80 [2021-08-06 20:18:51,727 INFO L354 Elim1Store]: treesize reduction 51, result has 55.3 percent of original size [2021-08-06 20:18:51,727 INFO L388 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 60 treesize of output 81 [2021-08-06 20:18:51,737 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:18:51,737 INFO L388 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 69 treesize of output 49 [2021-08-06 20:18:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:51,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796354818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:51,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:18:51,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:18:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828352779] [2021-08-06 20:18:51,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:18:51,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:18:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:18:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=486, Unknown=1, NotChecked=0, Total=552 [2021-08-06 20:18:51,802 INFO L87 Difference]: Start difference. First operand 5887 states and 9868 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:18:52,368 INFO L93 Difference]: Finished difference Result 6921 states and 11859 transitions. [2021-08-06 20:18:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:18:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:18:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:18:52,376 INFO L225 Difference]: With dead ends: 6921 [2021-08-06 20:18:52,376 INFO L226 Difference]: Without dead ends: 6916 [2021-08-06 20:18:52,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=70, Invalid=529, Unknown=1, NotChecked=0, Total=600 [2021-08-06 20:18:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-08-06 20:18:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 5893. [2021-08-06 20:18:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 1.677868295994569) internal successors, (9886), 5892 states have internal predecessors, (9886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 9886 transitions. [2021-08-06 20:18:52,430 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 9886 transitions. Word has length 45 [2021-08-06 20:18:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:18:52,430 INFO L470 AbstractCegarLoop]: Abstraction has 5893 states and 9886 transitions. [2021-08-06 20:18:52,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:18:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 9886 transitions. [2021-08-06 20:18:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:18:52,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:18:52,436 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:18:52,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 20:18:52,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:52,661 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:18:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:18:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -724752538, now seen corresponding path program 131 times [2021-08-06 20:18:52,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:18:52,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705751657] [2021-08-06 20:18:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:18:52,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:18:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:18:52,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:52,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:18:53,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:18:53,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:18:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:18:53,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:18:53,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705751657] [2021-08-06 20:18:53,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705751657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:18:53,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577943602] [2021-08-06 20:18:53,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:18:53,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:18:53,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:18:53,074 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:18:53,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 20:18:58,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:18:58,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:18:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:18:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:18:59,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:18:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 51 treesize of output 50 [2021-08-06 20:19:01,082 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:01,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 86 [2021-08-06 20:19:01,366 INFO L354 Elim1Store]: treesize reduction 118, result has 34.8 percent of original size [2021-08-06 20:19:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 86 [2021-08-06 20:19:01,397 INFO L354 Elim1Store]: treesize reduction 77, result has 26.7 percent of original size [2021-08-06 20:19:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 75 [2021-08-06 20:19:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:01,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577943602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:01,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:01,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-06 20:19:01,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685251896] [2021-08-06 20:19:01,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:19:01,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:01,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:19:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=1, NotChecked=0, Total=812 [2021-08-06 20:19:01,485 INFO L87 Difference]: Start difference. First operand 5893 states and 9886 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:19:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:08,497 INFO L93 Difference]: Finished difference Result 6649 states and 11322 transitions. [2021-08-06 20:19:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:19:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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 45 [2021-08-06 20:19:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:08,504 INFO L225 Difference]: With dead ends: 6649 [2021-08-06 20:19:08,504 INFO L226 Difference]: Without dead ends: 6644 [2021-08-06 20:19:08,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2430.6ms TimeCoverageRelationStatistics Valid=103, Invalid=1084, Unknown=3, NotChecked=0, Total=1190 [2021-08-06 20:19:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-08-06 20:19:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5899. [2021-08-06 20:19:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5899 states, 5898 states have (on average 1.6787046456425907) internal successors, (9901), 5898 states have internal predecessors, (9901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 9901 transitions. [2021-08-06 20:19:08,551 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 9901 transitions. Word has length 45 [2021-08-06 20:19:08,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:08,551 INFO L470 AbstractCegarLoop]: Abstraction has 5899 states and 9901 transitions. [2021-08-06 20:19:08,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:19:08,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 9901 transitions. [2021-08-06 20:19:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:08,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:08,556 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:08,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:08,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:08,785 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 72770718, now seen corresponding path program 132 times [2021-08-06 20:19:08,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:08,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773494532] [2021-08-06 20:19:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:08,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:08,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:08,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:09,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773494532] [2021-08-06 20:19:09,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773494532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231649321] [2021-08-06 20:19:09,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:19:09,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:09,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:09,097 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:09,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 20:19:14,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:19:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:19:14,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:15,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:15,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:19:15,636 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2021-08-06 20:19:15,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:15,848 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:19:15,851 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:19:15,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 40 [2021-08-06 20:19:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:15,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231649321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:15,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:15,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-06 20:19:15,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036682886] [2021-08-06 20:19:15,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:19:15,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:19:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:19:15,902 INFO L87 Difference]: Start difference. First operand 5899 states and 9901 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:16,230 INFO L93 Difference]: Finished difference Result 7688 states and 13334 transitions. [2021-08-06 20:19:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:19:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:16,240 INFO L225 Difference]: With dead ends: 7688 [2021-08-06 20:19:16,241 INFO L226 Difference]: Without dead ends: 7679 [2021-08-06 20:19:16,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:19:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-08-06 20:19:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 5908. [2021-08-06 20:19:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5908 states, 5907 states have (on average 1.680717792449636) internal successors, (9928), 5907 states have internal predecessors, (9928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 9928 transitions. [2021-08-06 20:19:16,309 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 9928 transitions. Word has length 45 [2021-08-06 20:19:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:16,310 INFO L470 AbstractCegarLoop]: Abstraction has 5908 states and 9928 transitions. [2021-08-06 20:19:16,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 9928 transitions. [2021-08-06 20:19:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:16,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:16,316 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:16,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 20:19:16,536 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2046626782, now seen corresponding path program 133 times [2021-08-06 20:19:16,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:16,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705893172] [2021-08-06 20:19:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:16,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:16,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:16,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:16,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:16,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705893172] [2021-08-06 20:19:16,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705893172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:16,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815204594] [2021-08-06 20:19:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:19:16,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:16,954 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:16,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 20:19:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:19:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:23,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:23,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:19:24,082 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:24,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 81 [2021-08-06 20:19:24,469 INFO L354 Elim1Store]: treesize reduction 51, result has 55.3 percent of original size [2021-08-06 20:19:24,469 INFO L388 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 60 treesize of output 81 [2021-08-06 20:19:24,479 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:19:24,479 INFO L388 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 69 treesize of output 49 [2021-08-06 20:19:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:24,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815204594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:24,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:24,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:19:24,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721135048] [2021-08-06 20:19:24,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:19:24,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:24,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:19:24,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:19:24,539 INFO L87 Difference]: Start difference. First operand 5908 states and 9928 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:25,046 INFO L93 Difference]: Finished difference Result 7861 states and 13576 transitions. [2021-08-06 20:19:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:19:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:25,056 INFO L225 Difference]: With dead ends: 7861 [2021-08-06 20:19:25,056 INFO L226 Difference]: Without dead ends: 7852 [2021-08-06 20:19:25,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:19:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-08-06 20:19:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 5918. [2021-08-06 20:19:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 5917 states have (on average 1.6827784350177455) internal successors, (9957), 5917 states have internal predecessors, (9957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 9957 transitions. [2021-08-06 20:19:25,119 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 9957 transitions. Word has length 45 [2021-08-06 20:19:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:25,119 INFO L470 AbstractCegarLoop]: Abstraction has 5918 states and 9957 transitions. [2021-08-06 20:19:25,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 9957 transitions. [2021-08-06 20:19:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:25,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:25,125 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:25,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:25,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 20:19:25,341 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1308282910, now seen corresponding path program 134 times [2021-08-06 20:19:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:25,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006991711] [2021-08-06 20:19:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:25,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:25,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:25,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:25,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:25,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006991711] [2021-08-06 20:19:25,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006991711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:25,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136503780] [2021-08-06 20:19:25,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:19:25,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:25,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:25,754 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 20:19:31,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:19:31,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:31,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:19:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:31,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:31,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:19:33,329 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:33,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 91 [2021-08-06 20:19:33,542 INFO L354 Elim1Store]: treesize reduction 48, result has 57.9 percent of original size [2021-08-06 20:19:33,542 INFO L388 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 60 treesize of output 84 [2021-08-06 20:19:33,547 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-06 20:19:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 46 [2021-08-06 20:19:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:33,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136503780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:33,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:33,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:19:33,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688332515] [2021-08-06 20:19:33,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:19:33,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:19:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:19:33,624 INFO L87 Difference]: Start difference. First operand 5918 states and 9957 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:34,044 INFO L93 Difference]: Finished difference Result 7835 states and 13460 transitions. [2021-08-06 20:19:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:19:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:34,054 INFO L225 Difference]: With dead ends: 7835 [2021-08-06 20:19:34,054 INFO L226 Difference]: Without dead ends: 7826 [2021-08-06 20:19:34,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:19:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-08-06 20:19:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5928. [2021-08-06 20:19:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 1.6848321241774928) internal successors, (9986), 5927 states have internal predecessors, (9986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 9986 transitions. [2021-08-06 20:19:34,114 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 9986 transitions. Word has length 45 [2021-08-06 20:19:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:34,114 INFO L470 AbstractCegarLoop]: Abstraction has 5928 states and 9986 transitions. [2021-08-06 20:19:34,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 9986 transitions. [2021-08-06 20:19:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:34,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:34,120 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:34,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:34,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 20:19:34,349 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -484662178, now seen corresponding path program 135 times [2021-08-06 20:19:34,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:34,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973165682] [2021-08-06 20:19:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:34,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:34,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:34,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:34,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:34,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973165682] [2021-08-06 20:19:34,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973165682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:34,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175844679] [2021-08-06 20:19:34,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:19:34,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:34,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:34,722 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:34,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 20:19:40,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:19:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:40,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 20:19:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:40,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:40,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:19:42,320 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:19:42,320 INFO L388 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 85 treesize of output 61 [2021-08-06 20:19:42,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:42,455 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:19:42,471 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:19:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175844679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:42,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:42,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:19:42,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855856456] [2021-08-06 20:19:42,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:19:42,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:19:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:19:42,739 INFO L87 Difference]: Start difference. First operand 5928 states and 9986 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:19:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:43,375 INFO L93 Difference]: Finished difference Result 7717 states and 13171 transitions. [2021-08-06 20:19:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:19:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 45 [2021-08-06 20:19:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:43,384 INFO L225 Difference]: With dead ends: 7717 [2021-08-06 20:19:43,384 INFO L226 Difference]: Without dead ends: 7658 [2021-08-06 20:19:43,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:19:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2021-08-06 20:19:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 5863. [2021-08-06 20:19:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5863 states, 5862 states have (on average 1.6786079836233367) internal successors, (9840), 5862 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5863 states to 5863 states and 9840 transitions. [2021-08-06 20:19:43,438 INFO L78 Accepts]: Start accepts. Automaton has 5863 states and 9840 transitions. Word has length 45 [2021-08-06 20:19:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:43,438 INFO L470 AbstractCegarLoop]: Abstraction has 5863 states and 9840 transitions. [2021-08-06 20:19:43,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:19:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5863 states and 9840 transitions. [2021-08-06 20:19:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:43,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:43,443 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:43,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 20:19:43,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:43,657 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1473837880, now seen corresponding path program 136 times [2021-08-06 20:19:43,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:43,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248897949] [2021-08-06 20:19:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:43,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:43,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:43,818 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:44,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:44,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248897949] [2021-08-06 20:19:44,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248897949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:44,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094176417] [2021-08-06 20:19:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:19:44,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:44,260 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:44,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 20:19:50,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:19:50,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:19:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:50,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:19:51,472 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:19:51,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 80 [2021-08-06 20:19:51,884 INFO L354 Elim1Store]: treesize reduction 51, result has 55.3 percent of original size [2021-08-06 20:19:51,885 INFO L388 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 60 treesize of output 81 [2021-08-06 20:19:51,895 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:19:51,895 INFO L388 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 69 treesize of output 49 [2021-08-06 20:19:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094176417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:51,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:19:51,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:19:51,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146026029] [2021-08-06 20:19:51,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:19:51,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:19:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:19:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:19:51,955 INFO L87 Difference]: Start difference. First operand 5863 states and 9840 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:19:52,462 INFO L93 Difference]: Finished difference Result 7215 states and 12403 transitions. [2021-08-06 20:19:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:19:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:19:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:19:52,471 INFO L225 Difference]: With dead ends: 7215 [2021-08-06 20:19:52,471 INFO L226 Difference]: Without dead ends: 7161 [2021-08-06 20:19:52,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:19:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7161 states. [2021-08-06 20:19:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7161 to 5982. [2021-08-06 20:19:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 1.681992977762916) internal successors, (10060), 5981 states have internal predecessors, (10060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 10060 transitions. [2021-08-06 20:19:52,522 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 10060 transitions. Word has length 45 [2021-08-06 20:19:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:19:52,522 INFO L470 AbstractCegarLoop]: Abstraction has 5982 states and 10060 transitions. [2021-08-06 20:19:52,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:19:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 10060 transitions. [2021-08-06 20:19:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:19:52,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:19:52,528 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:19:52,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 20:19:52,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 20:19:52,753 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:19:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:19:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash -654479156, now seen corresponding path program 137 times [2021-08-06 20:19:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:19:52,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370011807] [2021-08-06 20:19:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:19:52,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:19:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:19:52,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:52,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:19:53,046 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:19:53,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 70.7 percent of original size [2021-08-06 20:19:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:19:53,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:19:53,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370011807] [2021-08-06 20:19:53,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370011807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:19:53,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905644791] [2021-08-06 20:19:53,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:19:53,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:19:53,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:19:53,107 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:19:53,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 20:19:58,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:19:58,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:19:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:19:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:19:59,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:19:59,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 51 treesize of output 50 [2021-08-06 20:20:01,114 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:20:01,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 86 [2021-08-06 20:20:01,376 INFO L354 Elim1Store]: treesize reduction 118, result has 34.8 percent of original size [2021-08-06 20:20:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 86 [2021-08-06 20:20:01,391 INFO L354 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2021-08-06 20:20:01,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 69 [2021-08-06 20:20:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:01,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905644791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:01,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:01,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-06 20:20:01,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800971090] [2021-08-06 20:20:01,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:20:01,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:20:01,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:20:01,468 INFO L87 Difference]: Start difference. First operand 5982 states and 10060 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:20:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:02,311 INFO L93 Difference]: Finished difference Result 6854 states and 11718 transitions. [2021-08-06 20:20:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:20:02,311 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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 45 [2021-08-06 20:20:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:02,321 INFO L225 Difference]: With dead ends: 6854 [2021-08-06 20:20:02,322 INFO L226 Difference]: Without dead ends: 6849 [2021-08-06 20:20:02,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:20:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2021-08-06 20:20:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 5994. [2021-08-06 20:20:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 5993 states have (on average 1.678625062573002) internal successors, (10060), 5993 states have internal predecessors, (10060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 10060 transitions. [2021-08-06 20:20:02,392 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 10060 transitions. Word has length 45 [2021-08-06 20:20:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:02,393 INFO L470 AbstractCegarLoop]: Abstraction has 5994 states and 10060 transitions. [2021-08-06 20:20:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 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) [2021-08-06 20:20:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 10060 transitions. [2021-08-06 20:20:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:02,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:02,400 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:02,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 20:20:02,605 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1186876958, now seen corresponding path program 138 times [2021-08-06 20:20:02,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:02,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062847020] [2021-08-06 20:20:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:02,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:02,638 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:02,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:02,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:02,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062847020] [2021-08-06 20:20:02,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062847020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:02,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680881933] [2021-08-06 20:20:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:20:02,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:02,853 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:20:02,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 20:20:08,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:20:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 20:20:08,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:09,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:20:09,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 55 [2021-08-06 20:20:10,274 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:20:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 80 [2021-08-06 20:20:10,988 INFO L354 Elim1Store]: treesize reduction 77, result has 60.9 percent of original size [2021-08-06 20:20:10,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 149 [2021-08-06 20:20:10,999 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-08-06 20:20:10,999 INFO L388 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 131 treesize of output 91 [2021-08-06 20:20:11,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:20:11,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:20:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:11,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680881933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:11,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:11,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:20:11,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172763643] [2021-08-06 20:20:11,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:20:11,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:20:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:20:11,072 INFO L87 Difference]: Start difference. First operand 5994 states and 10060 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:20:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:12,133 INFO L93 Difference]: Finished difference Result 7658 states and 13271 transitions. [2021-08-06 20:20:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:20:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:20:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:12,144 INFO L225 Difference]: With dead ends: 7658 [2021-08-06 20:20:12,144 INFO L226 Difference]: Without dead ends: 7631 [2021-08-06 20:20:12,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1070.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:20:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-08-06 20:20:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 6003. [2021-08-06 20:20:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 1.680106631122959) internal successors, (10084), 6002 states have internal predecessors, (10084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 10084 transitions. [2021-08-06 20:20:12,208 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 10084 transitions. Word has length 45 [2021-08-06 20:20:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:12,208 INFO L470 AbstractCegarLoop]: Abstraction has 6003 states and 10084 transitions. [2021-08-06 20:20:12,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:20:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 10084 transitions. [2021-08-06 20:20:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:12,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:12,214 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:12,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:12,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:12,431 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:12,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:12,431 INFO L82 PathProgramCache]: Analyzing trace with hash -85382878, now seen corresponding path program 139 times [2021-08-06 20:20:12,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:12,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219177808] [2021-08-06 20:20:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:12,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:12,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:12,463 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:12,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219177808] [2021-08-06 20:20:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219177808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732497193] [2021-08-06 20:20:12,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:20:12,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:12,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:12,661 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:20:12,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 20:20:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:18,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:20:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:19,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:20:19,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:20:20,792 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:20:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 91 [2021-08-06 20:20:21,022 INFO L354 Elim1Store]: treesize reduction 48, result has 57.9 percent of original size [2021-08-06 20:20:21,023 INFO L388 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 60 treesize of output 84 [2021-08-06 20:20:21,027 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-06 20:20:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 46 [2021-08-06 20:20:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:21,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732497193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:21,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:21,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:20:21,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212579140] [2021-08-06 20:20:21,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:20:21,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:20:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:20:21,088 INFO L87 Difference]: Start difference. First operand 6003 states and 10084 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:23,566 INFO L93 Difference]: Finished difference Result 7660 states and 13110 transitions. [2021-08-06 20:20:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:20:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 20:20:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:23,576 INFO L225 Difference]: With dead ends: 7660 [2021-08-06 20:20:23,576 INFO L226 Difference]: Without dead ends: 7633 [2021-08-06 20:20:23,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:20:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-08-06 20:20:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6006. [2021-08-06 20:20:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 1.681931723563697) internal successors, (10100), 6005 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 10100 transitions. [2021-08-06 20:20:23,641 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 10100 transitions. Word has length 45 [2021-08-06 20:20:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:23,641 INFO L470 AbstractCegarLoop]: Abstraction has 6006 states and 10100 transitions. [2021-08-06 20:20:23,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 10100 transitions. [2021-08-06 20:20:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:23,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:23,647 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:23,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:23,869 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1878327966, now seen corresponding path program 140 times [2021-08-06 20:20:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502330661] [2021-08-06 20:20:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:23,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:23,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:23,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:24,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:24,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502330661] [2021-08-06 20:20:24,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502330661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:24,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196342926] [2021-08-06 20:20:24,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:20:24,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:24,310 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:20:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 20:20:30,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:20:30,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 20:20:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:30,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:20:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 49 [2021-08-06 20:20:32,281 INFO L354 Elim1Store]: treesize reduction 67, result has 4.3 percent of original size [2021-08-06 20:20:32,282 INFO L388 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 85 treesize of output 61 [2021-08-06 20:20:32,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:20:32,410 INFO L388 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-08-06 20:20:32,426 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:20:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 64 [2021-08-06 20:20:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196342926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:32,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-08-06 20:20:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113833776] [2021-08-06 20:20:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:20:32,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:20:32,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:20:32,507 INFO L87 Difference]: Start difference. First operand 6006 states and 10100 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:20:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:33,122 INFO L93 Difference]: Finished difference Result 7443 states and 12661 transitions. [2021-08-06 20:20:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:20:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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 45 [2021-08-06 20:20:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:33,132 INFO L225 Difference]: With dead ends: 7443 [2021-08-06 20:20:33,132 INFO L226 Difference]: Without dead ends: 7373 [2021-08-06 20:20:33,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:20:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7373 states. [2021-08-06 20:20:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7373 to 5975. [2021-08-06 20:20:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 5974 states have (on average 1.6791094743890191) internal successors, (10031), 5974 states have internal predecessors, (10031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 10031 transitions. [2021-08-06 20:20:33,192 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 10031 transitions. Word has length 45 [2021-08-06 20:20:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:33,192 INFO L470 AbstractCegarLoop]: Abstraction has 5975 states and 10031 transitions. [2021-08-06 20:20:33,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 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) [2021-08-06 20:20:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 10031 transitions. [2021-08-06 20:20:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:33,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:33,198 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:33,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:33,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:33,413 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 452290782, now seen corresponding path program 141 times [2021-08-06 20:20:33,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:33,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792813088] [2021-08-06 20:20:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:33,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:33,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:33,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:33,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:33,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792813088] [2021-08-06 20:20:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792813088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:33,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445100978] [2021-08-06 20:20:33,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:20:33,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:33,754 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:20:33,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 20:20:40,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:20:40,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:20:40,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 20:20:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:20:42,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:20:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 63 treesize of output 62 [2021-08-06 20:20:42,601 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:20:42,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 66 [2021-08-06 20:20:43,026 INFO L354 Elim1Store]: treesize reduction 77, result has 60.9 percent of original size [2021-08-06 20:20:43,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 149 [2021-08-06 20:20:43,040 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-08-06 20:20:43,041 INFO L388 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 131 treesize of output 91 [2021-08-06 20:20:43,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:20:43,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 70.6 percent of original size [2021-08-06 20:20:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:43,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445100978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:43,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:20:43,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-08-06 20:20:43,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682132697] [2021-08-06 20:20:43,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:20:43,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:20:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:20:43,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=674, Unknown=1, NotChecked=0, Total=756 [2021-08-06 20:20:43,176 INFO L87 Difference]: Start difference. First operand 5975 states and 10031 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:20:44,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:20:44,396 INFO L93 Difference]: Finished difference Result 7918 states and 13765 transitions. [2021-08-06 20:20:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:20:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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 45 [2021-08-06 20:20:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:20:44,406 INFO L225 Difference]: With dead ends: 7918 [2021-08-06 20:20:44,406 INFO L226 Difference]: Without dead ends: 7909 [2021-08-06 20:20:44,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2172.0ms TimeCoverageRelationStatistics Valid=176, Invalid=1715, Unknown=1, NotChecked=0, Total=1892 [2021-08-06 20:20:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7909 states. [2021-08-06 20:20:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7909 to 6089. [2021-08-06 20:20:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 6088 states have (on average 1.6824901445466491) internal successors, (10243), 6088 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:20:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 10243 transitions. [2021-08-06 20:20:44,473 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 10243 transitions. Word has length 45 [2021-08-06 20:20:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:20:44,473 INFO L470 AbstractCegarLoop]: Abstraction has 6089 states and 10243 transitions. [2021-08-06 20:20:44,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 27 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) [2021-08-06 20:20:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 10243 transitions. [2021-08-06 20:20:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 20:20:44,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:20:44,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:20:44,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 20:20:44,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:44,705 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:20:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:20:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1868820450, now seen corresponding path program 142 times [2021-08-06 20:20:44,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:20:44,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115664060] [2021-08-06 20:20:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:20:44,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:20:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:20:44,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:44,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 62.5 percent of original size [2021-08-06 20:20:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:20:45,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:20:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115664060] [2021-08-06 20:20:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115664060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:20:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452978544] [2021-08-06 20:20:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:20:45,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:20:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:20:45,088 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:20:45,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 20:20:47,072 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:20:47,072 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:20:48,106 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:20:48,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 20:20:48,274 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-06 20:20:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 20:20:48,307 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 3,while executing Executor. [2021-08-06 20:20:48,308 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:20:48,308 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:20:48,308 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:20:48,311 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:20:48,311 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:20:48,312 INFO L202 PluginConnector]: Adding new model prod-cons-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:20:48 BasicIcfg [2021-08-06 20:20:48,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:20:48,313 INFO L168 Benchmark]: Toolchain (without parser) took 890699.84 ms. Allocated memory was 160.4 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 139.5 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.31 ms. Allocated memory is still 160.4 MB. Free memory was 140.8 MB in the beginning and 140.6 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.17 ms. Allocated memory is still 160.4 MB. Free memory was 139.5 MB in the beginning and 137.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 INFO L168 Benchmark]: Boogie Preprocessor took 48.98 ms. Allocated memory is still 160.4 MB. Free memory was 137.9 MB in the beginning and 136.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 INFO L168 Benchmark]: RCFGBuilder took 203.12 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 122.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 INFO L168 Benchmark]: TraceAbstraction took 890376.68 ms. Allocated memory was 160.4 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 144.2 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-06 20:20:48,313 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 0.31 ms. Allocated memory is still 160.4 MB. Free memory was 140.8 MB in the beginning and 140.6 MB in the end (delta: 153.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.17 ms. Allocated memory is still 160.4 MB. Free memory was 139.5 MB in the beginning and 137.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.98 ms. Allocated memory is still 160.4 MB. Free memory was 137.9 MB in the beginning and 136.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 203.12 ms. Allocated memory is still 160.4 MB. Free memory was 136.8 MB in the beginning and 122.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 890376.68 ms. Allocated memory was 160.4 MB in the beginning and 3.4 GB in the end (delta: 3.3 GB). Free memory was 144.2 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 480, positive: 431, positive conditional: 431, positive unconditional: 0, negative: 49, negative conditional: 49, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 437, positive: 431, positive conditional: 0, positive unconditional: 431, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 116, positive: 113, positive conditional: 0, positive unconditional: 113, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 116, positive: 111, positive conditional: 0, positive unconditional: 111, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 18, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 437, positive: 318, positive conditional: 0, positive unconditional: 318, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 116, unknown conditional: 0, unknown unconditional: 116] , Statistics on independence cache: Total cache size (in pairs): 116, Positive cache size: 113, Positive conditional cache size: 0, Positive unconditional cache size: 113, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 43 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 3,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 47 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 890314.7ms, OverallIterations: 145, TraceHistogramMax: 3, EmptinessCheckTime: 519.8ms, AutomataDifference: 302490.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 107.4ms, PartialOrderReductionTime: 79.1ms, HoareTripleCheckerStatistics: 9288 SDtfs, 20287 SDslu, 78066 SDs, 0 SdLazy, 87949 SolverSat, 3227 SolverUnsat, 378 SolverUnknown, 0 SolverNotchecked, 244478.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8325 GetRequests, 4540 SyntacticMatches, 154 SemanticMatches, 3631 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26705 ImplicationChecksByTransitivity, 131989.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6104occurred in iteration=89, InterpolantAutomatonStates: 3085, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5939.5ms AutomataMinimizationTime, 144 MinimizatonAttempts, 198815 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 739.9ms SsaConstructionTime, 2606.6ms SatisfiabilityAnalysisTime, 203021.3ms InterpolantComputationTime, 10895 NumberOfCodeBlocks, 10895 NumberOfCodeBlocksAsserted, 510 NumberOfCheckSat, 10610 ConstructedInterpolants, 1677 QuantifiedInterpolants, 180062 SizeOfPredicates, 820 NumberOfNonLiveVariables, 13301 ConjunctsInSsa, 4009 ConjunctsInUnsatCore, 285 InterpolantComputations, 3 PerfectInterpolantSequences, 729/6957 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown