/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 18:17:52,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 18:17:52,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 18:17:52,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 18:17:52,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 18:17:52,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 18:17:52,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 18:17:52,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 18:17:52,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 18:17:52,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 18:17:52,665 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 18:17:52,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 18:17:52,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 18:17:52,666 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 18:17:52,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 18:17:52,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 18:17:52,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 18:17:52,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:52,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 18:17:52,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 18:17:52,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 18:17:52,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 18:17:52,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 18:17:52,881 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 18:17:52,883 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 18:17:52,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2022-03-01 18:17:52,885 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2022-03-01 18:17:52,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 18:17:52,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 18:17:52,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:52,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 18:17:52,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 18:17:52,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,938 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 18:17:52,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 18:17:52,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 18:17:52,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 18:17:52,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 18:17:52,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 18:17:52,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 18:17:52,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 18:17:52,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 18:17:52,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/1) ... [2022-03-01 18:17:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 18:17:52,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:52,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 18:17:52,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 18:17:53,019 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 18:17:53,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 18:17:53,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 18:17:53,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 18:17:53,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 18:17:53,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 18:17:53,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 18:17:53,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 18:17:53,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 18:17:53,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 18:17:53,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 18:17:53,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 18:17:53,022 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 18:17:53,058 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 18:17:53,059 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 18:17:53,134 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 18:17:53,139 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 18:17:53,140 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 18:17:53,141 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:53 BoogieIcfgContainer [2022-03-01 18:17:53,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 18:17:53,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 18:17:53,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 18:17:53,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 18:17:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 06:17:52" (1/2) ... [2022-03-01 18:17:53,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf0518c and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 06:17:53, skipping insertion in model container [2022-03-01 18:17:53,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 06:17:53" (2/2) ... [2022-03-01 18:17:53,155 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2022-03-01 18:17:53,162 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 18:17:53,163 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 18:17:53,163 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 18:17:53,163 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 18:17:53,212 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 18:17:53,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 18:17:53,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 18:17:53,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 18:17:53,279 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-01 18:17:53,326 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 18:17:53,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:53,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:53,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash 855514725, now seen corresponding path program 1 times [2022-03-01 18:17:53,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:53,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101683722] [2022-03-01 18:17:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:53,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101683722] [2022-03-01 18:17:53,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101683722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:53,477 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:53,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 18:17:53,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534709702] [2022-03-01 18:17:53,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:53,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 18:17:53,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 18:17:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:17:53,530 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:53,613 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-01 18:17:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 18:17:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 18:17:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:53,630 INFO L225 Difference]: With dead ends: 298 [2022-03-01 18:17:53,630 INFO L226 Difference]: Without dead ends: 283 [2022-03-01 18:17:53,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 18:17:53,637 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:53,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-01 18:17:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-01 18:17:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-01 18:17:53,724 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-01 18:17:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-01 18:17:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-01 18:17:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:53,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:53,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:53,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 18:17:53,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash -116344776, now seen corresponding path program 1 times [2022-03-01 18:17:53,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:53,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116942588] [2022-03-01 18:17:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:53,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:53,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:53,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116942588] [2022-03-01 18:17:53,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116942588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:53,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868517533] [2022-03-01 18:17:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:53,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:53,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 18:17:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:53,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:54,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:54,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868517533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:54,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:54,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-01 18:17:54,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178937125] [2022-03-01 18:17:54,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:54,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:17:54,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:17:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:17:54,277 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:54,949 INFO L93 Difference]: Finished difference Result 1259 states and 3629 transitions. [2022-03-01 18:17:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:17:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-03-01 18:17:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:54,964 INFO L225 Difference]: With dead ends: 1259 [2022-03-01 18:17:54,965 INFO L226 Difference]: Without dead ends: 1259 [2022-03-01 18:17:54,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:17:54,968 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:54,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:17:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-01 18:17:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 253. [2022-03-01 18:17:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2022-03-01 18:17:55,025 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2022-03-01 18:17:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:55,026 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2022-03-01 18:17:55,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2022-03-01 18:17:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:55,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:55,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:55,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:55,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:55,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash -310245444, now seen corresponding path program 2 times [2022-03-01 18:17:55,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:55,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140697116] [2022-03-01 18:17:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:55,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:55,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140697116] [2022-03-01 18:17:55,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140697116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:55,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174303659] [2022-03-01 18:17:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:17:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:55,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:55,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 18:17:55,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:55,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:55,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:55,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174303659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:55,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:55,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-01 18:17:55,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551993421] [2022-03-01 18:17:55,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:55,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:17:55,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:17:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:17:55,577 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,018 INFO L93 Difference]: Finished difference Result 1133 states and 3241 transitions. [2022-03-01 18:17:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:17:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-03-01 18:17:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,025 INFO L225 Difference]: With dead ends: 1133 [2022-03-01 18:17:56,025 INFO L226 Difference]: Without dead ends: 1133 [2022-03-01 18:17:56,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:17:56,027 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 95 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-01 18:17:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 252. [2022-03-01 18:17:56,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2022-03-01 18:17:56,043 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2022-03-01 18:17:56,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,043 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2022-03-01 18:17:56,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2022-03-01 18:17:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:56,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:56,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-01 18:17:56,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1009084743, now seen corresponding path program 1 times [2022-03-01 18:17:56,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462868475] [2022-03-01 18:17:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:56,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462868475] [2022-03-01 18:17:56,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462868475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:56,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:56,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:17:56,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941999823] [2022-03-01 18:17:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:56,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:17:56,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:17:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:56,311 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,380 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2022-03-01 18:17:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,383 INFO L225 Difference]: With dead ends: 483 [2022-03-01 18:17:56,384 INFO L226 Difference]: Without dead ends: 477 [2022-03-01 18:17:56,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:56,385 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 28 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-01 18:17:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2022-03-01 18:17:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-03-01 18:17:56,397 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2022-03-01 18:17:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,397 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-03-01 18:17:56,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-03-01 18:17:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:56,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 18:17:56,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1724408590, now seen corresponding path program 1 times [2022-03-01 18:17:56,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497843448] [2022-03-01 18:17:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:56,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497843448] [2022-03-01 18:17:56,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497843448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:56,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:56,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:17:56,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439855641] [2022-03-01 18:17:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:56,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:56,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:56,443 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,527 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2022-03-01 18:17:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:17:56,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,531 INFO L225 Difference]: With dead ends: 539 [2022-03-01 18:17:56,531 INFO L226 Difference]: Without dead ends: 521 [2022-03-01 18:17:56,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:56,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 45 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-01 18:17:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2022-03-01 18:17:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2022-03-01 18:17:56,547 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2022-03-01 18:17:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,548 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2022-03-01 18:17:56,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2022-03-01 18:17:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:56,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 18:17:56,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1927279607, now seen corresponding path program 2 times [2022-03-01 18:17:56,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967277846] [2022-03-01 18:17:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:56,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967277846] [2022-03-01 18:17:56,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967277846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:56,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:56,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 18:17:56,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344016506] [2022-03-01 18:17:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:56,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 18:17:56,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 18:17:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 18:17:56,590 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,645 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2022-03-01 18:17:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 18:17:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,648 INFO L225 Difference]: With dead ends: 486 [2022-03-01 18:17:56,648 INFO L226 Difference]: Without dead ends: 486 [2022-03-01 18:17:56,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:56,649 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 18:17:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-03-01 18:17:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2022-03-01 18:17:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2022-03-01 18:17:56,660 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2022-03-01 18:17:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2022-03-01 18:17:56,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2022-03-01 18:17:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:56,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 18:17:56,662 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1202883661, now seen corresponding path program 3 times [2022-03-01 18:17:56,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465051976] [2022-03-01 18:17:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:56,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465051976] [2022-03-01 18:17:56,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465051976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:56,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:56,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 18:17:56,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672651479] [2022-03-01 18:17:56,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:56,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:56,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:56,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:56,705 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:56,783 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2022-03-01 18:17:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 18:17:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:56,787 INFO L225 Difference]: With dead ends: 438 [2022-03-01 18:17:56,787 INFO L226 Difference]: Without dead ends: 438 [2022-03-01 18:17:56,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:56,788 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:56,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-01 18:17:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2022-03-01 18:17:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-01 18:17:56,798 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-01 18:17:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:56,799 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-01 18:17:56,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-01 18:17:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:56,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:56,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:56,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 18:17:56,800 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700470, now seen corresponding path program 3 times [2022-03-01 18:17:56,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:56,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299026619] [2022-03-01 18:17:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:56,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:56,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299026619] [2022-03-01 18:17:56,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299026619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:56,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966843556] [2022-03-01 18:17:56,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:17:56,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:56,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:56,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 18:17:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:17:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:56,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:56,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966843556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:57,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:57,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-01 18:17:57,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73960907] [2022-03-01 18:17:57,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:57,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:17:57,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:17:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:57,078 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:57,457 INFO L93 Difference]: Finished difference Result 1154 states and 3249 transitions. [2022-03-01 18:17:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 18:17:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 21 [2022-03-01 18:17:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:57,463 INFO L225 Difference]: With dead ends: 1154 [2022-03-01 18:17:57,463 INFO L226 Difference]: Without dead ends: 1154 [2022-03-01 18:17:57,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:17:57,464 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:57,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 89 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:17:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-01 18:17:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 323. [2022-03-01 18:17:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-01 18:17:57,484 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-01 18:17:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:57,485 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-01 18:17:57,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-01 18:17:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:57,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:57,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:57,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:57,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:57,704 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash -731586770, now seen corresponding path program 2 times [2022-03-01 18:17:57,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:57,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105241626] [2022-03-01 18:17:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:57,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105241626] [2022-03-01 18:17:57,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105241626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:57,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:57,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 18:17:57,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226347205] [2022-03-01 18:17:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:57,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 18:17:57,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 18:17:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 18:17:57,759 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:57,878 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2022-03-01 18:17:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:57,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:57,882 INFO L225 Difference]: With dead ends: 466 [2022-03-01 18:17:57,882 INFO L226 Difference]: Without dead ends: 466 [2022-03-01 18:17:57,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:17:57,884 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:57,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-01 18:17:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2022-03-01 18:17:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2022-03-01 18:17:57,894 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2022-03-01 18:17:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:57,894 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2022-03-01 18:17:57,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2022-03-01 18:17:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:57,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:57,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:57,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 18:17:57,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1391482172, now seen corresponding path program 4 times [2022-03-01 18:17:57,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:57,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614942382] [2022-03-01 18:17:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:57,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:57,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614942382] [2022-03-01 18:17:57,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614942382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:57,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:57,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 18:17:57,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479097111] [2022-03-01 18:17:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:57,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:57,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:57,943 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:58,054 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2022-03-01 18:17:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 18:17:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:58,058 INFO L225 Difference]: With dead ends: 541 [2022-03-01 18:17:58,058 INFO L226 Difference]: Without dead ends: 537 [2022-03-01 18:17:58,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:17:58,059 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:58,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-01 18:17:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2022-03-01 18:17:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2022-03-01 18:17:58,070 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2022-03-01 18:17:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:58,070 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2022-03-01 18:17:58,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2022-03-01 18:17:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:58,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:58,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:58,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-01 18:17:58,073 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1513963908, now seen corresponding path program 5 times [2022-03-01 18:17:58,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:58,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681911986] [2022-03-01 18:17:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:58,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:58,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681911986] [2022-03-01 18:17:58,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681911986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:58,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755078409] [2022-03-01 18:17:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:17:58,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:58,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:58,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 18:17:58,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:17:58,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:17:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 18:17:58,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755078409] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:58,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-01 18:17:58,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2022-03-01 18:17:58,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243121907] [2022-03-01 18:17:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:58,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:58,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:58,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:58,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:17:58,319 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:58,473 INFO L93 Difference]: Finished difference Result 653 states and 1834 transitions. [2022-03-01 18:17:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 18:17:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:58,477 INFO L225 Difference]: With dead ends: 653 [2022-03-01 18:17:58,477 INFO L226 Difference]: Without dead ends: 653 [2022-03-01 18:17:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:17:58,478 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:58,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 63 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-01 18:17:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 278. [2022-03-01 18:17:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2022-03-01 18:17:58,487 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2022-03-01 18:17:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:58,488 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2022-03-01 18:17:58,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2022-03-01 18:17:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 18:17:58,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:58,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:58,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:58,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:58,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash 268685562, now seen corresponding path program 6 times [2022-03-01 18:17:58,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:58,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087301552] [2022-03-01 18:17:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:58,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:58,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087301552] [2022-03-01 18:17:58,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087301552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 18:17:58,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 18:17:58,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 18:17:58,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471346036] [2022-03-01 18:17:58,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 18:17:58,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 18:17:58,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 18:17:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 18:17:58,745 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:58,823 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-03-01 18:17:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:17:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 18:17:58,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:58,825 INFO L225 Difference]: With dead ends: 429 [2022-03-01 18:17:58,826 INFO L226 Difference]: Without dead ends: 425 [2022-03-01 18:17:58,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-01 18:17:58,826 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:58,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-01 18:17:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2022-03-01 18:17:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2022-03-01 18:17:58,835 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2022-03-01 18:17:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:58,835 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2022-03-01 18:17:58,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2022-03-01 18:17:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:58,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:58,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:58,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 18:17:58,837 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1300936698, now seen corresponding path program 1 times [2022-03-01 18:17:58,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:58,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860327739] [2022-03-01 18:17:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:58,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:58,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:58,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860327739] [2022-03-01 18:17:58,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860327739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:58,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533379772] [2022-03-01 18:17:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:58,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:58,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:58,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 18:17:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:58,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:17:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:17:59,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:17:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:17:59,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:17:59,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:17:59,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:17:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533379772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:17:59,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:17:59,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-01 18:17:59,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491938488] [2022-03-01 18:17:59,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:17:59,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 18:17:59,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:17:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 18:17:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:17:59,303 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:17:59,386 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2022-03-01 18:17:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:17:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:17:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:17:59,389 INFO L225 Difference]: With dead ends: 552 [2022-03-01 18:17:59,389 INFO L226 Difference]: Without dead ends: 537 [2022-03-01 18:17:59,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:17:59,390 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:17:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:17:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-01 18:17:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2022-03-01 18:17:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2022-03-01 18:17:59,401 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2022-03-01 18:17:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:17:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2022-03-01 18:17:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:17:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2022-03-01 18:17:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:17:59,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:17:59,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:17:59,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 18:17:59,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 18:17:59,612 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:17:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:17:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1432556635, now seen corresponding path program 1 times [2022-03-01 18:17:59,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:17:59,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412513174] [2022-03-01 18:17:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:17:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:17:59,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:17:59,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412513174] [2022-03-01 18:17:59,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412513174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:17:59,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500359789] [2022-03-01 18:17:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:17:59,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:17:59,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:17:59,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:17:59,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 18:17:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:17:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:17:59,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:18:00,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:18:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:00,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:00,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:00,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:00,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:00,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500359789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:00,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:00,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-01 18:18:00,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928365145] [2022-03-01 18:18:00,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:00,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:18:00,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:18:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:18:00,413 INFO L87 Difference]: Start difference. First operand 372 states and 1106 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) [2022-03-01 18:18:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:01,485 INFO L93 Difference]: Finished difference Result 850 states and 2460 transitions. [2022-03-01 18:18:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:01,486 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 24 [2022-03-01 18:18:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:01,489 INFO L225 Difference]: With dead ends: 850 [2022-03-01 18:18:01,490 INFO L226 Difference]: Without dead ends: 835 [2022-03-01 18:18:01,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:18:01,491 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:01,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-01 18:18:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 438. [2022-03-01 18:18:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2022-03-01 18:18:01,504 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2022-03-01 18:18:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:01,504 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2022-03-01 18:18:01,504 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) [2022-03-01 18:18:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2022-03-01 18:18:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:01,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:01,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:01,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:01,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1637705597, now seen corresponding path program 2 times [2022-03-01 18:18:01,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:01,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796210385] [2022-03-01 18:18:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:01,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:01,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796210385] [2022-03-01 18:18:01,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796210385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:01,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301267559] [2022-03-01 18:18:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:01,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:01,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 18:18:02,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:02,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:02,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:02,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-03-01 18:18:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:02,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:02,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:02,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:02,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:02,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301267559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:02,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:02,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-01 18:18:02,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35084989] [2022-03-01 18:18:02,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:02,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 18:18:02,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 18:18:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:18:02,536 INFO L87 Difference]: Start difference. First operand 438 states and 1291 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) [2022-03-01 18:18:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:04,065 INFO L93 Difference]: Finished difference Result 1170 states and 3382 transitions. [2022-03-01 18:18:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:18:04,066 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 24 [2022-03-01 18:18:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:04,072 INFO L225 Difference]: With dead ends: 1170 [2022-03-01 18:18:04,072 INFO L226 Difference]: Without dead ends: 1155 [2022-03-01 18:18:04,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:18:04,073 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 270 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:04,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 222 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-03-01 18:18:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 439. [2022-03-01 18:18:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2022-03-01 18:18:04,089 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2022-03-01 18:18:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2022-03-01 18:18:04,089 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) [2022-03-01 18:18:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2022-03-01 18:18:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:04,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:04,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:04,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:04,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:04,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 142032238, now seen corresponding path program 2 times [2022-03-01 18:18:04,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:04,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492408556] [2022-03-01 18:18:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:04,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492408556] [2022-03-01 18:18:04,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492408556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:04,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709910978] [2022-03-01 18:18:04,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:04,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:04,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:04,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:04,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 18:18:04,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 18:18:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:04,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 18:18:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:04,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:04,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:04,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-03-01 18:18:04,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-01 18:18:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:04,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709910978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:04,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:04,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-01 18:18:04,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812028700] [2022-03-01 18:18:04,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:04,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 18:18:04,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 18:18:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 18:18:04,693 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:04,790 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2022-03-01 18:18:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 18:18:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:18:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:04,793 INFO L225 Difference]: With dead ends: 645 [2022-03-01 18:18:04,794 INFO L226 Difference]: Without dead ends: 630 [2022-03-01 18:18:04,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 18:18:04,794 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:04,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:18:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-01 18:18:04,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2022-03-01 18:18:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2022-03-01 18:18:04,807 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2022-03-01 18:18:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:04,807 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2022-03-01 18:18:04,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2022-03-01 18:18:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:04,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:04,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:05,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 18:18:05,032 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1337506361, now seen corresponding path program 3 times [2022-03-01 18:18:05,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:05,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541349526] [2022-03-01 18:18:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:05,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:05,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541349526] [2022-03-01 18:18:05,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541349526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:05,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179235615] [2022-03-01 18:18:05,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:05,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:05,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:05,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:05,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 18:18:05,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:18:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:05,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:05,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:18:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:05,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:05,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:05,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:05,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:05,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179235615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:05,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:05,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-03-01 18:18:05,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839898402] [2022-03-01 18:18:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:05,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:18:05,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:05,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:18:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:18:05,715 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:06,041 INFO L93 Difference]: Finished difference Result 679 states and 1940 transitions. [2022-03-01 18:18:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:18:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 24 [2022-03-01 18:18:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:06,044 INFO L225 Difference]: With dead ends: 679 [2022-03-01 18:18:06,044 INFO L226 Difference]: Without dead ends: 664 [2022-03-01 18:18:06,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-03-01 18:18:06,045 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:06,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 139 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-01 18:18:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 465. [2022-03-01 18:18:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2022-03-01 18:18:06,057 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2022-03-01 18:18:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:06,057 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2022-03-01 18:18:06,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2022-03-01 18:18:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:06,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:06,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:06,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-01 18:18:06,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 18:18:06,282 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 857029177, now seen corresponding path program 4 times [2022-03-01 18:18:06,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:06,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705699493] [2022-03-01 18:18:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:06,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:06,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705699493] [2022-03-01 18:18:06,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705699493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:06,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042049837] [2022-03-01 18:18:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:06,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:06,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 18:18:06,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:06,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:06,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 18:18:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:06,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:06,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:06,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:06,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:06,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042049837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:06,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:06,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 18:18:06,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103823321] [2022-03-01 18:18:06,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:06,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:06,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:06,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:06,912 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:07,356 INFO L93 Difference]: Finished difference Result 794 states and 2321 transitions. [2022-03-01 18:18:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:18:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:18:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:07,360 INFO L225 Difference]: With dead ends: 794 [2022-03-01 18:18:07,360 INFO L226 Difference]: Without dead ends: 779 [2022-03-01 18:18:07,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-01 18:18:07,361 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:07,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 138 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-01 18:18:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 469. [2022-03-01 18:18:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2022-03-01 18:18:07,372 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2022-03-01 18:18:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:07,373 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2022-03-01 18:18:07,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2022-03-01 18:18:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:07,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:07,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:07,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:07,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 18:18:07,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1638934791, now seen corresponding path program 5 times [2022-03-01 18:18:07,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:07,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888435607] [2022-03-01 18:18:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:07,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:07,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888435607] [2022-03-01 18:18:07,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888435607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:07,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634281863] [2022-03-01 18:18:07,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:07,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:07,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:07,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:07,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 18:18:07,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:07,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:08,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:08,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-01 18:18:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:08,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:08,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:08,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:08,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634281863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:08,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:08,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-01 18:18:08,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554593107] [2022-03-01 18:18:08,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:08,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:08,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:08,380 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:08,872 INFO L93 Difference]: Finished difference Result 1008 states and 2935 transitions. [2022-03-01 18:18:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 24 [2022-03-01 18:18:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:08,877 INFO L225 Difference]: With dead ends: 1008 [2022-03-01 18:18:08,877 INFO L226 Difference]: Without dead ends: 978 [2022-03-01 18:18:08,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:08,878 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:08,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 217 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 445 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-01 18:18:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-01 18:18:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 471. [2022-03-01 18:18:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9574468085106385) internal successors, (1390), 470 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1390 transitions. [2022-03-01 18:18:08,895 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1390 transitions. Word has length 24 [2022-03-01 18:18:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:08,896 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1390 transitions. [2022-03-01 18:18:08,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1390 transitions. [2022-03-01 18:18:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:08,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:08,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:09,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:09,111 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash -931811517, now seen corresponding path program 6 times [2022-03-01 18:18:09,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:09,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52224661] [2022-03-01 18:18:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:09,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:09,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52224661] [2022-03-01 18:18:09,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52224661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:09,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334011619] [2022-03-01 18:18:09,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:09,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:09,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 18:18:09,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:18:09,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:09,520 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:18:09,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-03-01 18:18:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:09,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:09,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:09,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:09,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334011619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:09,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:09,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-01 18:18:09,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651133705] [2022-03-01 18:18:09,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:09,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:18:09,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:09,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:18:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:18:09,775 INFO L87 Difference]: Start difference. First operand 471 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:10,911 INFO L93 Difference]: Finished difference Result 935 states and 2730 transitions. [2022-03-01 18:18:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 18:18:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:18:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:10,915 INFO L225 Difference]: With dead ends: 935 [2022-03-01 18:18:10,916 INFO L226 Difference]: Without dead ends: 920 [2022-03-01 18:18:10,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 18:18:10,917 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:10,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 575 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-03-01 18:18:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-01 18:18:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 487. [2022-03-01 18:18:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.9794238683127574) internal successors, (1448), 486 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1448 transitions. [2022-03-01 18:18:10,931 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1448 transitions. Word has length 24 [2022-03-01 18:18:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:10,931 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1448 transitions. [2022-03-01 18:18:10,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:10,931 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1448 transitions. [2022-03-01 18:18:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:10,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:10,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:10,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:11,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:11,147 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1768350663, now seen corresponding path program 7 times [2022-03-01 18:18:11,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:11,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849028960] [2022-03-01 18:18:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:11,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:11,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849028960] [2022-03-01 18:18:11,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849028960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:11,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624424498] [2022-03-01 18:18:11,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:11,356 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:11,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 18:18:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:11,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:11,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:11,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-01 18:18:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:11,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:11,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:11,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:11,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624424498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:11,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:11,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-01 18:18:11,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515758849] [2022-03-01 18:18:11,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:11,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 18:18:11,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:11,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 18:18:11,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:18:11,845 INFO L87 Difference]: Start difference. First operand 487 states and 1448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:12,297 INFO L93 Difference]: Finished difference Result 1068 states and 3118 transitions. [2022-03-01 18:18:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 24 [2022-03-01 18:18:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:12,303 INFO L225 Difference]: With dead ends: 1068 [2022-03-01 18:18:12,303 INFO L226 Difference]: Without dead ends: 1038 [2022-03-01 18:18:12,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:12,304 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 187 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-01 18:18:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-03-01 18:18:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 483. [2022-03-01 18:18:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.975103734439834) internal successors, (1434), 482 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1434 transitions. [2022-03-01 18:18:12,318 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1434 transitions. Word has length 24 [2022-03-01 18:18:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:12,318 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1434 transitions. [2022-03-01 18:18:12,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1434 transitions. [2022-03-01 18:18:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:12,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:12,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:12,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 18:18:12,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-01 18:18:12,535 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 906932625, now seen corresponding path program 8 times [2022-03-01 18:18:12,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:12,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116761075] [2022-03-01 18:18:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:12,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116761075] [2022-03-01 18:18:12,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116761075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:12,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003930938] [2022-03-01 18:18:12,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:12,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:12,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:12,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 18:18:12,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:12,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:12,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-03-01 18:18:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:12,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:13,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:13,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:13,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:13,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003930938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:13,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:13,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-01 18:18:13,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224610126] [2022-03-01 18:18:13,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:13,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 18:18:13,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 18:18:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-01 18:18:13,190 INFO L87 Difference]: Start difference. First operand 483 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:14,873 INFO L93 Difference]: Finished difference Result 1208 states and 3557 transitions. [2022-03-01 18:18:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:18:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:18:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:14,883 INFO L225 Difference]: With dead ends: 1208 [2022-03-01 18:18:14,884 INFO L226 Difference]: Without dead ends: 1193 [2022-03-01 18:18:14,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 18:18:14,885 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 231 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:14,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-01 18:18:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 473. [2022-03-01 18:18:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9533898305084745) internal successors, (1394), 472 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1394 transitions. [2022-03-01 18:18:14,900 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1394 transitions. Word has length 24 [2022-03-01 18:18:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:14,901 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1394 transitions. [2022-03-01 18:18:14,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1394 transitions. [2022-03-01 18:18:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 18:18:14,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:14,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:14,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:15,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:15,116 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1310802373, now seen corresponding path program 9 times [2022-03-01 18:18:15,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:15,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741606057] [2022-03-01 18:18:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:15,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:15,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:15,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741606057] [2022-03-01 18:18:15,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741606057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:15,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148342879] [2022-03-01 18:18:15,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:15,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:15,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:15,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:15,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 18:18:15,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 18:18:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:15,523 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 18:18:15,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2022-03-01 18:18:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:15,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:18:15,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-01 18:18:15,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-01 18:18:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:15,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148342879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:15,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:15,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-01 18:18:15,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739380160] [2022-03-01 18:18:15,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:15,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:18:15,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:18:15,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:18:15,751 INFO L87 Difference]: Start difference. First operand 473 states and 1394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:16,506 INFO L93 Difference]: Finished difference Result 904 states and 2639 transitions. [2022-03-01 18:18:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:16,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 18:18:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:16,509 INFO L225 Difference]: With dead ends: 904 [2022-03-01 18:18:16,509 INFO L226 Difference]: Without dead ends: 889 [2022-03-01 18:18:16,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:18:16,510 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:16,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 422 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-01 18:18:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-01 18:18:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 471. [2022-03-01 18:18:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2022-03-01 18:18:16,523 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2022-03-01 18:18:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:16,523 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2022-03-01 18:18:16,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2022-03-01 18:18:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:16,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:16,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:16,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:16,748 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065829, now seen corresponding path program 3 times [2022-03-01 18:18:16,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:16,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912871753] [2022-03-01 18:18:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:16,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:16,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:16,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912871753] [2022-03-01 18:18:16,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912871753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:16,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524064388] [2022-03-01 18:18:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:16,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:16,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:16,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 18:18:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:18:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:16,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:17,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524064388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:17,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:17,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:18:17,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943763555] [2022-03-01 18:18:17,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:17,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:18:17,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:18:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:18:17,062 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:18,457 INFO L93 Difference]: Finished difference Result 3570 states and 10088 transitions. [2022-03-01 18:18:18,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:18:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:18,467 INFO L225 Difference]: With dead ends: 3570 [2022-03-01 18:18:18,467 INFO L226 Difference]: Without dead ends: 3570 [2022-03-01 18:18:18,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1738, Invalid=6272, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 18:18:18,470 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 590 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:18,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 330 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-03-01 18:18:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 658. [2022-03-01 18:18:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2739726027397262) internal successors, (2151), 657 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2151 transitions. [2022-03-01 18:18:18,510 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2151 transitions. Word has length 27 [2022-03-01 18:18:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:18,510 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2151 transitions. [2022-03-01 18:18:18,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2151 transitions. [2022-03-01 18:18:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:18,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:18,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:18,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:18,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 18:18:18,722 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1967000799, now seen corresponding path program 4 times [2022-03-01 18:18:18,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:18,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302386678] [2022-03-01 18:18:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:18,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302386678] [2022-03-01 18:18:18,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302386678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:18,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643362252] [2022-03-01 18:18:18,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:18,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:18,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:18,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:18,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 18:18:18,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:18,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:18,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:19,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643362252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:19,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:19,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:18:19,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435714513] [2022-03-01 18:18:19,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:19,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:18:19,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:18:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:18:19,020 INFO L87 Difference]: Start difference. First operand 658 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:21,089 INFO L93 Difference]: Finished difference Result 3557 states and 10114 transitions. [2022-03-01 18:18:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-01 18:18:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:21,100 INFO L225 Difference]: With dead ends: 3557 [2022-03-01 18:18:21,100 INFO L226 Difference]: Without dead ends: 3557 [2022-03-01 18:18:21,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2334, Invalid=9876, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:18:21,103 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 639 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:21,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 439 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 18:18:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-03-01 18:18:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 642. [2022-03-01 18:18:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.2449297971918876) internal successors, (2080), 641 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2080 transitions. [2022-03-01 18:18:21,142 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2080 transitions. Word has length 27 [2022-03-01 18:18:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:21,143 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2080 transitions. [2022-03-01 18:18:21,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2080 transitions. [2022-03-01 18:18:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:21,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:21,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:21,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:21,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:21,349 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:21,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1712302181, now seen corresponding path program 5 times [2022-03-01 18:18:21,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:21,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352628311] [2022-03-01 18:18:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:21,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:21,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:21,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352628311] [2022-03-01 18:18:21,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352628311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:21,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149389596] [2022-03-01 18:18:21,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:21,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:21,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:21,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:21,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 18:18:21,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:21,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:21,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:21,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149389596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:21,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:21,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:18:21,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304799926] [2022-03-01 18:18:21,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:21,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:18:21,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:18:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:18:21,659 INFO L87 Difference]: Start difference. First operand 642 states and 2080 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:22,727 INFO L93 Difference]: Finished difference Result 2695 states and 7631 transitions. [2022-03-01 18:18:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:18:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:22,735 INFO L225 Difference]: With dead ends: 2695 [2022-03-01 18:18:22,735 INFO L226 Difference]: Without dead ends: 2695 [2022-03-01 18:18:22,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1021, Invalid=3671, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 18:18:22,737 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:22,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 280 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-03-01 18:18:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 650. [2022-03-01 18:18:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2342064714946073) internal successors, (2099), 649 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2099 transitions. [2022-03-01 18:18:22,768 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2099 transitions. Word has length 27 [2022-03-01 18:18:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:22,768 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2099 transitions. [2022-03-01 18:18:22,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2099 transitions. [2022-03-01 18:18:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:22,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:22,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:22,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:22,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:22,988 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash 599427504, now seen corresponding path program 10 times [2022-03-01 18:18:22,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:22,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569144983] [2022-03-01 18:18:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:23,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:23,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569144983] [2022-03-01 18:18:23,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569144983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:23,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284647205] [2022-03-01 18:18:23,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:23,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:23,039 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:23,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 18:18:23,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:23,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:23,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:23,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284647205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:23,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:23,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:18:23,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543595180] [2022-03-01 18:18:23,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:23,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:18:23,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:18:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:18:23,249 INFO L87 Difference]: Start difference. First operand 650 states and 2099 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:24,086 INFO L93 Difference]: Finished difference Result 2700 states and 7794 transitions. [2022-03-01 18:18:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:18:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:24,093 INFO L225 Difference]: With dead ends: 2700 [2022-03-01 18:18:24,093 INFO L226 Difference]: Without dead ends: 2700 [2022-03-01 18:18:24,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:18:24,094 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 418 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:24,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 242 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-03-01 18:18:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 669. [2022-03-01 18:18:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2230538922155687) internal successors, (2153), 668 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2153 transitions. [2022-03-01 18:18:24,125 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2153 transitions. Word has length 27 [2022-03-01 18:18:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:24,125 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2153 transitions. [2022-03-01 18:18:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2153 transitions. [2022-03-01 18:18:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:24,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:24,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:24,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:24,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:24,351 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1019160408, now seen corresponding path program 6 times [2022-03-01 18:18:24,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:24,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110971420] [2022-03-01 18:18:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:24,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:24,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110971420] [2022-03-01 18:18:24,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110971420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:24,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030401552] [2022-03-01 18:18:24,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:24,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:24,387 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:24,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 18:18:24,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:24,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:24,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030401552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:24,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:24,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 18:18:24,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18999082] [2022-03-01 18:18:24,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:24,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:18:24,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:18:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:18:24,548 INFO L87 Difference]: Start difference. First operand 669 states and 2153 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:24,712 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2022-03-01 18:18:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 18:18:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:24,717 INFO L225 Difference]: With dead ends: 1474 [2022-03-01 18:18:24,717 INFO L226 Difference]: Without dead ends: 1450 [2022-03-01 18:18:24,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-03-01 18:18:24,718 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:24,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 85 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:18:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-03-01 18:18:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1011. [2022-03-01 18:18:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.291089108910891) internal successors, (3324), 1010 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3324 transitions. [2022-03-01 18:18:24,744 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3324 transitions. Word has length 27 [2022-03-01 18:18:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:24,744 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3324 transitions. [2022-03-01 18:18:24,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3324 transitions. [2022-03-01 18:18:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:24,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:24,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:24,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:24,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 18:18:24,970 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1294087731, now seen corresponding path program 1 times [2022-03-01 18:18:24,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:24,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790224281] [2022-03-01 18:18:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:25,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790224281] [2022-03-01 18:18:25,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790224281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:25,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585944289] [2022-03-01 18:18:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:25,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:25,016 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:25,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 18:18:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:25,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585944289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:25,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:25,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:18:25,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633288188] [2022-03-01 18:18:25,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:25,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:25,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:25,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:25,236 INFO L87 Difference]: Start difference. First operand 1011 states and 3324 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) 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) [2022-03-01 18:18:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:25,793 INFO L93 Difference]: Finished difference Result 2336 states and 6930 transitions. [2022-03-01 18:18:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:18:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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 27 [2022-03-01 18:18:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:25,800 INFO L225 Difference]: With dead ends: 2336 [2022-03-01 18:18:25,800 INFO L226 Difference]: Without dead ends: 2310 [2022-03-01 18:18:25,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:18:25,801 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 334 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:25,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-03-01 18:18:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1264. [2022-03-01 18:18:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.32541567695962) internal successors, (4200), 1263 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4200 transitions. [2022-03-01 18:18:25,850 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4200 transitions. Word has length 27 [2022-03-01 18:18:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:25,850 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4200 transitions. [2022-03-01 18:18:25,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) 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) [2022-03-01 18:18:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4200 transitions. [2022-03-01 18:18:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:25,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:25,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:25,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:26,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 18:18:26,067 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash -374136488, now seen corresponding path program 11 times [2022-03-01 18:18:26,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:26,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780704395] [2022-03-01 18:18:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:26,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780704395] [2022-03-01 18:18:26,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780704395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:26,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231574998] [2022-03-01 18:18:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:26,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:26,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:26,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 18:18:26,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231574998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:26,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:26,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:18:26,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651125072] [2022-03-01 18:18:26,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:26,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:18:26,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:18:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:18:26,311 INFO L87 Difference]: Start difference. First operand 1264 states and 4200 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:26,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:26,641 INFO L93 Difference]: Finished difference Result 3138 states and 9728 transitions. [2022-03-01 18:18:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 18:18:26,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:26,648 INFO L225 Difference]: With dead ends: 3138 [2022-03-01 18:18:26,649 INFO L226 Difference]: Without dead ends: 3099 [2022-03-01 18:18:26,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:18:26,650 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:26,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 212 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-03-01 18:18:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1754. [2022-03-01 18:18:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.407872219053052) internal successors, (5974), 1753 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5974 transitions. [2022-03-01 18:18:26,710 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5974 transitions. Word has length 27 [2022-03-01 18:18:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:26,710 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5974 transitions. [2022-03-01 18:18:26,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5974 transitions. [2022-03-01 18:18:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:26,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:26,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:26,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:26,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:26,927 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1217309363, now seen corresponding path program 2 times [2022-03-01 18:18:26,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:26,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16021918] [2022-03-01 18:18:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:26,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:26,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16021918] [2022-03-01 18:18:26,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16021918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:26,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275641201] [2022-03-01 18:18:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:26,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:26,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:26,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:26,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 18:18:27,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:27,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:27,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:27,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275641201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:27,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:27,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:18:27,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390446651] [2022-03-01 18:18:27,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:27,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:27,181 INFO L87 Difference]: Start difference. First operand 1754 states and 5974 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:27,621 INFO L93 Difference]: Finished difference Result 2934 states and 9093 transitions. [2022-03-01 18:18:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:18:27,621 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:27,628 INFO L225 Difference]: With dead ends: 2934 [2022-03-01 18:18:27,628 INFO L226 Difference]: Without dead ends: 2912 [2022-03-01 18:18:27,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:18:27,629 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:27,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 109 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-03-01 18:18:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1747. [2022-03-01 18:18:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.413516609392898) internal successors, (5960), 1746 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5960 transitions. [2022-03-01 18:18:27,683 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5960 transitions. Word has length 27 [2022-03-01 18:18:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5960 transitions. [2022-03-01 18:18:27,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5960 transitions. [2022-03-01 18:18:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:27,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:27,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:27,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:27,911 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2125115793, now seen corresponding path program 3 times [2022-03-01 18:18:27,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:27,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846251746] [2022-03-01 18:18:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:27,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:27,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846251746] [2022-03-01 18:18:27,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846251746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:27,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684214190] [2022-03-01 18:18:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:27,949 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:27,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 18:18:27,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:18:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:28,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:28,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684214190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:28,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:28,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 18:18:28,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362923326] [2022-03-01 18:18:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:28,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:18:28,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:18:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:18:28,125 INFO L87 Difference]: Start difference. First operand 1747 states and 5960 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:28,563 INFO L93 Difference]: Finished difference Result 4585 states and 13921 transitions. [2022-03-01 18:18:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:18:28,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:28,575 INFO L225 Difference]: With dead ends: 4585 [2022-03-01 18:18:28,575 INFO L226 Difference]: Without dead ends: 4559 [2022-03-01 18:18:28,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:28,576 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 355 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:28,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 98 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2022-03-01 18:18:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1846. [2022-03-01 18:18:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.4655826558265583) internal successors, (6394), 1845 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6394 transitions. [2022-03-01 18:18:28,669 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6394 transitions. Word has length 27 [2022-03-01 18:18:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:28,669 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6394 transitions. [2022-03-01 18:18:28,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6394 transitions. [2022-03-01 18:18:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:28,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:28,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:28,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:28,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:28,889 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -665957700, now seen corresponding path program 7 times [2022-03-01 18:18:28,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:28,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709575175] [2022-03-01 18:18:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:28,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:28,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:28,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709575175] [2022-03-01 18:18:28,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709575175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:28,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067975177] [2022-03-01 18:18:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:28,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:28,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:28,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:28,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 18:18:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067975177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:29,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:29,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-01 18:18:29,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583812757] [2022-03-01 18:18:29,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:29,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:18:29,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:18:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:18:29,107 INFO L87 Difference]: Start difference. First operand 1846 states and 6394 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:29,381 INFO L93 Difference]: Finished difference Result 3417 states and 10465 transitions. [2022-03-01 18:18:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:18:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-01 18:18:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:29,394 INFO L225 Difference]: With dead ends: 3417 [2022-03-01 18:18:29,394 INFO L226 Difference]: Without dead ends: 3417 [2022-03-01 18:18:29,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:18:29,395 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 356 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:29,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 125 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:18:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-03-01 18:18:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1858. [2022-03-01 18:18:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4426494345718903) internal successors, (6393), 1857 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6393 transitions. [2022-03-01 18:18:29,450 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6393 transitions. Word has length 27 [2022-03-01 18:18:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:29,450 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6393 transitions. [2022-03-01 18:18:29,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6393 transitions. [2022-03-01 18:18:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:29,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:29,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:29,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:29,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-01 18:18:29,667 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1012536837, now seen corresponding path program 8 times [2022-03-01 18:18:29,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:29,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116215877] [2022-03-01 18:18:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:29,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116215877] [2022-03-01 18:18:29,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116215877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:29,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105445927] [2022-03-01 18:18:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:29,726 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:29,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 18:18:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:29,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105445927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:29,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:29,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-01 18:18:29,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129161625] [2022-03-01 18:18:29,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:29,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:29,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:29,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:29,936 INFO L87 Difference]: Start difference. First operand 1858 states and 6393 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:30,777 INFO L93 Difference]: Finished difference Result 7165 states and 21721 transitions. [2022-03-01 18:18:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:18:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:30,792 INFO L225 Difference]: With dead ends: 7165 [2022-03-01 18:18:30,793 INFO L226 Difference]: Without dead ends: 7165 [2022-03-01 18:18:30,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 18:18:30,794 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 535 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:30,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 215 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-01 18:18:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2005. [2022-03-01 18:18:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4865269461077846) internal successors, (6987), 2004 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6987 transitions. [2022-03-01 18:18:30,882 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6987 transitions. Word has length 27 [2022-03-01 18:18:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:30,883 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 6987 transitions. [2022-03-01 18:18:30,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6987 transitions. [2022-03-01 18:18:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:30,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:30,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:30,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:31,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-01 18:18:31,103 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash 970143219, now seen corresponding path program 4 times [2022-03-01 18:18:31,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:31,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449419705] [2022-03-01 18:18:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:31,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:31,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449419705] [2022-03-01 18:18:31,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449419705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:31,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533206040] [2022-03-01 18:18:31,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:31,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:31,146 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:31,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 18:18:31,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:31,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:31,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:31,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533206040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:31,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:31,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 18:18:31,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179084349] [2022-03-01 18:18:31,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:18:31,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:18:31,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:18:31,316 INFO L87 Difference]: Start difference. First operand 2005 states and 6987 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:31,828 INFO L93 Difference]: Finished difference Result 4592 states and 14316 transitions. [2022-03-01 18:18:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:18:31,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:31,837 INFO L225 Difference]: With dead ends: 4592 [2022-03-01 18:18:31,837 INFO L226 Difference]: Without dead ends: 4592 [2022-03-01 18:18:31,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:18:31,838 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:31,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 148 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-03-01 18:18:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2181. [2022-03-01 18:18:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.5022935779816513) internal successors, (7635), 2180 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7635 transitions. [2022-03-01 18:18:31,908 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7635 transitions. Word has length 27 [2022-03-01 18:18:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:31,908 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7635 transitions. [2022-03-01 18:18:31,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7635 transitions. [2022-03-01 18:18:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:31,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:31,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:31,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 18:18:32,136 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1201755135, now seen corresponding path program 9 times [2022-03-01 18:18:32,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:32,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527546272] [2022-03-01 18:18:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:32,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527546272] [2022-03-01 18:18:32,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527546272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:32,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562208142] [2022-03-01 18:18:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:32,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:32,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:32,179 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:32,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 18:18:32,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:18:32,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:32,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562208142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:32,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:32,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-01 18:18:32,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989594374] [2022-03-01 18:18:32,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:32,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:32,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:32,363 INFO L87 Difference]: Start difference. First operand 2181 states and 7635 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:33,093 INFO L93 Difference]: Finished difference Result 7070 states and 21694 transitions. [2022-03-01 18:18:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 18:18:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:33,108 INFO L225 Difference]: With dead ends: 7070 [2022-03-01 18:18:33,108 INFO L226 Difference]: Without dead ends: 7062 [2022-03-01 18:18:33,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:18:33,109 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 523 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:33,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 191 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2022-03-01 18:18:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 2191. [2022-03-01 18:18:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.491324200913242) internal successors, (7646), 2190 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7646 transitions. [2022-03-01 18:18:33,205 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7646 transitions. Word has length 27 [2022-03-01 18:18:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:33,205 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7646 transitions. [2022-03-01 18:18:33,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7646 transitions. [2022-03-01 18:18:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:33,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:33,210 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:33,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:33,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:33,423 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash 187766081, now seen corresponding path program 10 times [2022-03-01 18:18:33,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:33,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464903975] [2022-03-01 18:18:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:33,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:33,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464903975] [2022-03-01 18:18:33,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464903975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:33,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160624322] [2022-03-01 18:18:33,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:33,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:33,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:33,471 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:33,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 18:18:33,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:33,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160624322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:33,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:33,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:18:33,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784924729] [2022-03-01 18:18:33,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:33,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:33,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:33,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:33,689 INFO L87 Difference]: Start difference. First operand 2191 states and 7646 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:34,914 INFO L93 Difference]: Finished difference Result 7232 states and 21469 transitions. [2022-03-01 18:18:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:18:34,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:34,927 INFO L225 Difference]: With dead ends: 7232 [2022-03-01 18:18:34,928 INFO L226 Difference]: Without dead ends: 7232 [2022-03-01 18:18:34,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:18:34,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:34,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 303 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-03-01 18:18:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 2309. [2022-03-01 18:18:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.470103986135182) internal successors, (8009), 2308 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8009 transitions. [2022-03-01 18:18:35,031 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8009 transitions. Word has length 27 [2022-03-01 18:18:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:35,031 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8009 transitions. [2022-03-01 18:18:35,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8009 transitions. [2022-03-01 18:18:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:35,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:35,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:35,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 18:18:35,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 18:18:35,251 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1970415551, now seen corresponding path program 11 times [2022-03-01 18:18:35,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:35,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509061030] [2022-03-01 18:18:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:35,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:35,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509061030] [2022-03-01 18:18:35,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509061030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:35,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110654111] [2022-03-01 18:18:35,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:35,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:35,292 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:35,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 18:18:35,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:18:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:35,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110654111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:35,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:35,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:18:35,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017303849] [2022-03-01 18:18:35,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:35,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:35,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:35,515 INFO L87 Difference]: Start difference. First operand 2309 states and 8009 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:36,924 INFO L93 Difference]: Finished difference Result 7083 states and 21556 transitions. [2022-03-01 18:18:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 18:18:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:36,937 INFO L225 Difference]: With dead ends: 7083 [2022-03-01 18:18:36,937 INFO L226 Difference]: Without dead ends: 7075 [2022-03-01 18:18:36,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1646, Invalid=6010, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:18:36,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 589 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:36,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 293 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-03-01 18:18:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 2309. [2022-03-01 18:18:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.468370883882149) internal successors, (8005), 2308 states have internal predecessors, (8005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8005 transitions. [2022-03-01 18:18:37,015 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8005 transitions. Word has length 27 [2022-03-01 18:18:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:37,015 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8005 transitions. [2022-03-01 18:18:37,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8005 transitions. [2022-03-01 18:18:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:37,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:37,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:37,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 18:18:37,235 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1109408773, now seen corresponding path program 12 times [2022-03-01 18:18:37,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:37,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300736445] [2022-03-01 18:18:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:37,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300736445] [2022-03-01 18:18:37,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300736445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:37,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852268243] [2022-03-01 18:18:37,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:37,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:37,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:37,287 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:37,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 18:18:37,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:18:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:37,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:37,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852268243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:37,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:37,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:18:37,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551708439] [2022-03-01 18:18:37,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:37,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:18:37,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:18:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:18:37,522 INFO L87 Difference]: Start difference. First operand 2309 states and 8005 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:38,479 INFO L93 Difference]: Finished difference Result 6206 states and 18904 transitions. [2022-03-01 18:18:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:18:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:38,491 INFO L225 Difference]: With dead ends: 6206 [2022-03-01 18:18:38,492 INFO L226 Difference]: Without dead ends: 6206 [2022-03-01 18:18:38,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 18:18:38,492 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 422 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:38,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 301 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6206 states. [2022-03-01 18:18:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6206 to 2335. [2022-03-01 18:18:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 3.4670094258783206) internal successors, (8092), 2334 states have internal predecessors, (8092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 8092 transitions. [2022-03-01 18:18:38,556 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 8092 transitions. Word has length 27 [2022-03-01 18:18:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:38,557 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 8092 transitions. [2022-03-01 18:18:38,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 8092 transitions. [2022-03-01 18:18:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:38,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:38,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:38,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 18:18:38,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 18:18:38,761 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2007542286, now seen corresponding path program 12 times [2022-03-01 18:18:38,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:38,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165288093] [2022-03-01 18:18:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:38,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:38,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:38,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165288093] [2022-03-01 18:18:38,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165288093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:38,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726089944] [2022-03-01 18:18:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:38,804 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:38,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 18:18:38,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:18:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:38,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:38,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:38,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726089944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:38,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:38,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:18:38,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398770905] [2022-03-01 18:18:38,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:38,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:18:38,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:18:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:18:38,980 INFO L87 Difference]: Start difference. First operand 2335 states and 8092 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:39,578 INFO L93 Difference]: Finished difference Result 6462 states and 20430 transitions. [2022-03-01 18:18:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:18:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:39,592 INFO L225 Difference]: With dead ends: 6462 [2022-03-01 18:18:39,592 INFO L226 Difference]: Without dead ends: 6462 [2022-03-01 18:18:39,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 18:18:39,593 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:39,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 169 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-03-01 18:18:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 2361. [2022-03-01 18:18:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.465677966101695) internal successors, (8179), 2360 states have internal predecessors, (8179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8179 transitions. [2022-03-01 18:18:39,667 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8179 transitions. Word has length 27 [2022-03-01 18:18:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:39,668 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8179 transitions. [2022-03-01 18:18:39,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8179 transitions. [2022-03-01 18:18:39,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:39,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:39,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:39,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:39,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 18:18:39,872 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2095266658, now seen corresponding path program 13 times [2022-03-01 18:18:39,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:39,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7331830] [2022-03-01 18:18:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:39,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:39,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7331830] [2022-03-01 18:18:39,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7331830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:39,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600944636] [2022-03-01 18:18:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:39,913 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:39,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 18:18:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:40,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:40,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600944636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:40,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:40,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:18:40,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299226940] [2022-03-01 18:18:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:40,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:18:40,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:18:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:18:40,095 INFO L87 Difference]: Start difference. First operand 2361 states and 8179 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:40,785 INFO L93 Difference]: Finished difference Result 6568 states and 20814 transitions. [2022-03-01 18:18:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 18:18:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:40,799 INFO L225 Difference]: With dead ends: 6568 [2022-03-01 18:18:40,799 INFO L226 Difference]: Without dead ends: 6568 [2022-03-01 18:18:40,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:18:40,800 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:40,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 188 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-03-01 18:18:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 2497. [2022-03-01 18:18:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 3.4451121794871793) internal successors, (8599), 2496 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 8599 transitions. [2022-03-01 18:18:40,900 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 8599 transitions. Word has length 27 [2022-03-01 18:18:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:40,900 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 8599 transitions. [2022-03-01 18:18:40,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 8599 transitions. [2022-03-01 18:18:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:40,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:40,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:40,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-01 18:18:41,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-01 18:18:41,105 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1473299244, now seen corresponding path program 14 times [2022-03-01 18:18:41,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:41,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994358310] [2022-03-01 18:18:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:41,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:41,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:41,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994358310] [2022-03-01 18:18:41,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994358310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:41,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341285496] [2022-03-01 18:18:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:41,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:41,153 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:41,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 18:18:41,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:41,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341285496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:41,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:41,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-01 18:18:41,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130298272] [2022-03-01 18:18:41,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:41,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:41,322 INFO L87 Difference]: Start difference. First operand 2497 states and 8599 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:41,634 INFO L93 Difference]: Finished difference Result 5147 states and 16513 transitions. [2022-03-01 18:18:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:18:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:41,645 INFO L225 Difference]: With dead ends: 5147 [2022-03-01 18:18:41,645 INFO L226 Difference]: Without dead ends: 5147 [2022-03-01 18:18:41,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:18:41,645 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 291 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:41,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 183 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-03-01 18:18:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2941. [2022-03-01 18:18:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 3.463265306122449) internal successors, (10182), 2940 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 10182 transitions. [2022-03-01 18:18:41,732 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 10182 transitions. Word has length 27 [2022-03-01 18:18:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 10182 transitions. [2022-03-01 18:18:41,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 10182 transitions. [2022-03-01 18:18:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:41,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:41,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:41,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 18:18:41,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:41,955 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:41,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash 649769698, now seen corresponding path program 15 times [2022-03-01 18:18:41,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:41,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281003258] [2022-03-01 18:18:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:41,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:41,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281003258] [2022-03-01 18:18:41,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281003258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:41,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449920637] [2022-03-01 18:18:41,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:41,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:41,996 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:41,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 18:18:42,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:18:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:42,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:42,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449920637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:42,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:42,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:18:42,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682248666] [2022-03-01 18:18:42,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:42,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:18:42,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:18:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:18:42,159 INFO L87 Difference]: Start difference. First operand 2941 states and 10182 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:42,777 INFO L93 Difference]: Finished difference Result 7126 states and 23054 transitions. [2022-03-01 18:18:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 18:18:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:42,793 INFO L225 Difference]: With dead ends: 7126 [2022-03-01 18:18:42,793 INFO L226 Difference]: Without dead ends: 7122 [2022-03-01 18:18:42,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:18:42,794 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:42,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 197 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-01 18:18:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 2923. [2022-03-01 18:18:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.4603011635865846) internal successors, (10111), 2922 states have internal predecessors, (10111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 10111 transitions. [2022-03-01 18:18:42,876 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 10111 transitions. Word has length 27 [2022-03-01 18:18:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:42,876 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 10111 transitions. [2022-03-01 18:18:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 10111 transitions. [2022-03-01 18:18:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:42,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:42,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:42,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 18:18:43,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 18:18:43,083 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1999520671, now seen corresponding path program 5 times [2022-03-01 18:18:43,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:43,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415888319] [2022-03-01 18:18:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:43,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415888319] [2022-03-01 18:18:43,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415888319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:43,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796479420] [2022-03-01 18:18:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:43,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:43,118 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:43,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 18:18:43,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:43,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:43,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796479420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:43,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:43,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:18:43,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395413584] [2022-03-01 18:18:43,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:43,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:43,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:43,297 INFO L87 Difference]: Start difference. First operand 2923 states and 10111 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2022-03-01 18:18:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:43,757 INFO L93 Difference]: Finished difference Result 4977 states and 15922 transitions. [2022-03-01 18:18:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 18:18:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 27 [2022-03-01 18:18:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:43,767 INFO L225 Difference]: With dead ends: 4977 [2022-03-01 18:18:43,767 INFO L226 Difference]: Without dead ends: 4962 [2022-03-01 18:18:43,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:18:43,768 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 350 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:43,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 117 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-03-01 18:18:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3080. [2022-03-01 18:18:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.505034101981163) internal successors, (10792), 3079 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 10792 transitions. [2022-03-01 18:18:43,834 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 10792 transitions. Word has length 27 [2022-03-01 18:18:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:43,834 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 10792 transitions. [2022-03-01 18:18:43,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2022-03-01 18:18:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 10792 transitions. [2022-03-01 18:18:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:43,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:43,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:43,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 18:18:44,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:44,040 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1750676451, now seen corresponding path program 6 times [2022-03-01 18:18:44,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:44,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780504192] [2022-03-01 18:18:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:44,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:44,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:44,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780504192] [2022-03-01 18:18:44,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780504192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:44,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782669470] [2022-03-01 18:18:44,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:44,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:44,077 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:44,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 18:18:44,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 18:18:44,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:44,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:44,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782669470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:44,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:44,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 18:18:44,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952426390] [2022-03-01 18:18:44,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:44,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:44,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:44,259 INFO L87 Difference]: Start difference. First operand 3080 states and 10792 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) 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) [2022-03-01 18:18:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:44,772 INFO L93 Difference]: Finished difference Result 5951 states and 18520 transitions. [2022-03-01 18:18:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 18:18:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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 27 [2022-03-01 18:18:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:44,805 INFO L225 Difference]: With dead ends: 5951 [2022-03-01 18:18:44,805 INFO L226 Difference]: Without dead ends: 5951 [2022-03-01 18:18:44,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:18:44,805 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 360 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:44,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 139 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:18:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-01 18:18:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2989. [2022-03-01 18:18:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2988 states have (on average 3.4745649263721554) internal successors, (10382), 2988 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 10382 transitions. [2022-03-01 18:18:44,869 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 10382 transitions. Word has length 27 [2022-03-01 18:18:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:44,869 INFO L470 AbstractCegarLoop]: Abstraction has 2989 states and 10382 transitions. [2022-03-01 18:18:44,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) 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) [2022-03-01 18:18:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 10382 transitions. [2022-03-01 18:18:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:44,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:44,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:44,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 18:18:45,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 18:18:45,075 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1579991646, now seen corresponding path program 16 times [2022-03-01 18:18:45,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:45,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519269669] [2022-03-01 18:18:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:45,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:45,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519269669] [2022-03-01 18:18:45,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519269669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:45,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904359210] [2022-03-01 18:18:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:45,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:45,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 18:18:45,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:45,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:45,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:45,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:45,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904359210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:45,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:45,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:18:45,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921230911] [2022-03-01 18:18:45,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:45,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:45,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:45,342 INFO L87 Difference]: Start difference. First operand 2989 states and 10382 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:46,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:46,841 INFO L93 Difference]: Finished difference Result 11830 states and 37070 transitions. [2022-03-01 18:18:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 18:18:46,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:46,865 INFO L225 Difference]: With dead ends: 11830 [2022-03-01 18:18:46,865 INFO L226 Difference]: Without dead ends: 11830 [2022-03-01 18:18:46,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1772, Invalid=6418, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:18:46,866 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 706 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:46,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 311 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 18:18:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2022-03-01 18:18:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 3006. [2022-03-01 18:18:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.485524126455907) internal successors, (10474), 3005 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 10474 transitions. [2022-03-01 18:18:47,003 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 10474 transitions. Word has length 27 [2022-03-01 18:18:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:47,004 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 10474 transitions. [2022-03-01 18:18:47,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 10474 transitions. [2022-03-01 18:18:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:47,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:47,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:47,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:47,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 18:18:47,209 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1773892314, now seen corresponding path program 17 times [2022-03-01 18:18:47,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:47,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006463794] [2022-03-01 18:18:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:47,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:47,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006463794] [2022-03-01 18:18:47,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006463794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:47,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119276254] [2022-03-01 18:18:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:47,256 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:47,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 18:18:47,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:18:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:47,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:47,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:47,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119276254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:47,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:47,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-01 18:18:47,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937740622] [2022-03-01 18:18:47,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:47,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:47,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:47,494 INFO L87 Difference]: Start difference. First operand 3006 states and 10474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:48,598 INFO L93 Difference]: Finished difference Result 9772 states and 30478 transitions. [2022-03-01 18:18:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:18:48,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:48,617 INFO L225 Difference]: With dead ends: 9772 [2022-03-01 18:18:48,617 INFO L226 Difference]: Without dead ends: 9772 [2022-03-01 18:18:48,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3829, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:18:48,618 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 609 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:48,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 289 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2022-03-01 18:18:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 2975. [2022-03-01 18:18:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.4714189643577673) internal successors, (10324), 2974 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10324 transitions. [2022-03-01 18:18:48,717 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10324 transitions. Word has length 27 [2022-03-01 18:18:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:48,717 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 10324 transitions. [2022-03-01 18:18:48,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10324 transitions. [2022-03-01 18:18:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:48,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:48,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:48,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 18:18:48,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 18:18:48,923 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash -225266257, now seen corresponding path program 7 times [2022-03-01 18:18:48,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:48,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879787863] [2022-03-01 18:18:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:48,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:48,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879787863] [2022-03-01 18:18:48,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879787863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:48,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261115468] [2022-03-01 18:18:48,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:48,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:48,967 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:48,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 18:18:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:48,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261115468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:49,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:49,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 18:18:49,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696058455] [2022-03-01 18:18:49,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:49,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:18:49,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:18:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:18:49,120 INFO L87 Difference]: Start difference. First operand 2975 states and 10324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:49,382 INFO L93 Difference]: Finished difference Result 4784 states and 15583 transitions. [2022-03-01 18:18:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:18:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:49,391 INFO L225 Difference]: With dead ends: 4784 [2022-03-01 18:18:49,392 INFO L226 Difference]: Without dead ends: 4747 [2022-03-01 18:18:49,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:49,392 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:49,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-03-01 18:18:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3475. [2022-03-01 18:18:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3475 states, 3474 states have (on average 3.4905008635578585) internal successors, (12126), 3474 states have internal predecessors, (12126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 12126 transitions. [2022-03-01 18:18:49,462 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 12126 transitions. Word has length 27 [2022-03-01 18:18:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:49,462 INFO L470 AbstractCegarLoop]: Abstraction has 3475 states and 12126 transitions. [2022-03-01 18:18:49,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 12126 transitions. [2022-03-01 18:18:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:49,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:49,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:49,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 18:18:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 18:18:49,669 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1380238831, now seen corresponding path program 8 times [2022-03-01 18:18:49,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:49,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709730153] [2022-03-01 18:18:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:49,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709730153] [2022-03-01 18:18:49,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709730153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:49,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975175863] [2022-03-01 18:18:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:49,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:49,710 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:49,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 18:18:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:49,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:49,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975175863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:49,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:49,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 18:18:49,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259548676] [2022-03-01 18:18:49,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:49,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:18:49,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:18:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:18:49,890 INFO L87 Difference]: Start difference. First operand 3475 states and 12126 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:50,178 INFO L93 Difference]: Finished difference Result 4950 states and 16086 transitions. [2022-03-01 18:18:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:18:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:50,189 INFO L225 Difference]: With dead ends: 4950 [2022-03-01 18:18:50,189 INFO L226 Difference]: Without dead ends: 4950 [2022-03-01 18:18:50,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:50,190 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:50,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:18:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-03-01 18:18:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3463. [2022-03-01 18:18:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 3.4803581744656267) internal successors, (12049), 3462 states have internal predecessors, (12049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 12049 transitions. [2022-03-01 18:18:50,288 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 12049 transitions. Word has length 27 [2022-03-01 18:18:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:50,288 INFO L470 AbstractCegarLoop]: Abstraction has 3463 states and 12049 transitions. [2022-03-01 18:18:50,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 12049 transitions. [2022-03-01 18:18:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:50,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:50,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:50,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 18:18:50,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 18:18:50,495 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1293927831, now seen corresponding path program 13 times [2022-03-01 18:18:50,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:50,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847090581] [2022-03-01 18:18:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:50,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:50,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:50,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847090581] [2022-03-01 18:18:50,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847090581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:50,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272771355] [2022-03-01 18:18:50,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:50,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:50,534 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:50,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 18:18:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:50,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:50,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:50,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272771355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:50,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:50,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:18:50,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556283195] [2022-03-01 18:18:50,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:50,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:50,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:50,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:50,801 INFO L87 Difference]: Start difference. First operand 3463 states and 12049 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:52,285 INFO L93 Difference]: Finished difference Result 13772 states and 44128 transitions. [2022-03-01 18:18:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:18:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:52,315 INFO L225 Difference]: With dead ends: 13772 [2022-03-01 18:18:52,315 INFO L226 Difference]: Without dead ends: 13772 [2022-03-01 18:18:52,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1770, Invalid=6602, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 18:18:52,316 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:52,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 267 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-03-01 18:18:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 4598. [2022-03-01 18:18:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.5729823798129217) internal successors, (16425), 4597 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16425 transitions. [2022-03-01 18:18:52,478 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16425 transitions. Word has length 27 [2022-03-01 18:18:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:52,478 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16425 transitions. [2022-03-01 18:18:52,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16425 transitions. [2022-03-01 18:18:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:52,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:52,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:52,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 18:18:52,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 18:18:52,687 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1100027163, now seen corresponding path program 14 times [2022-03-01 18:18:52,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:52,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697143763] [2022-03-01 18:18:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:52,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:52,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697143763] [2022-03-01 18:18:52,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697143763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:52,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666995651] [2022-03-01 18:18:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:18:52,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:52,734 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 18:18:52,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:18:52,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:52,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:52,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:52,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666995651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:52,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:52,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:18:52,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643378254] [2022-03-01 18:18:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:52,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:18:52,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:18:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:18:52,979 INFO L87 Difference]: Start difference. First operand 4598 states and 16425 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:54,263 INFO L93 Difference]: Finished difference Result 11895 states and 38033 transitions. [2022-03-01 18:18:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 18:18:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:54,291 INFO L225 Difference]: With dead ends: 11895 [2022-03-01 18:18:54,292 INFO L226 Difference]: Without dead ends: 11895 [2022-03-01 18:18:54,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 18:18:54,293 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 699 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 269 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:18:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2022-03-01 18:18:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 4597. [2022-03-01 18:18:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 3.571366405570061) internal successors, (16414), 4596 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 16414 transitions. [2022-03-01 18:18:54,492 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 16414 transitions. Word has length 27 [2022-03-01 18:18:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:54,492 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 16414 transitions. [2022-03-01 18:18:54,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 16414 transitions. [2022-03-01 18:18:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:54,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:54,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:54,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 18:18:54,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-01 18:18:54,702 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1526676838, now seen corresponding path program 15 times [2022-03-01 18:18:54,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:54,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94979193] [2022-03-01 18:18:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:54,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:54,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94979193] [2022-03-01 18:18:54,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94979193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:54,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821757916] [2022-03-01 18:18:54,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:18:54,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:54,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:54,743 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:54,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 18:18:54,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 18:18:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:54,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:54,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:54,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821757916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:54,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:54,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-01 18:18:54,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848115450] [2022-03-01 18:18:54,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:54,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:18:54,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:18:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:18:54,969 INFO L87 Difference]: Start difference. First operand 4597 states and 16414 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:55,229 INFO L93 Difference]: Finished difference Result 6491 states and 22125 transitions. [2022-03-01 18:18:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:18:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-01 18:18:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:55,249 INFO L225 Difference]: With dead ends: 6491 [2022-03-01 18:18:55,249 INFO L226 Difference]: Without dead ends: 6480 [2022-03-01 18:18:55,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-03-01 18:18:55,251 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:55,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:18:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-03-01 18:18:55,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 4687. [2022-03-01 18:18:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.5742637644046096) internal successors, (16749), 4686 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 16749 transitions. [2022-03-01 18:18:55,387 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 16749 transitions. Word has length 27 [2022-03-01 18:18:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:55,387 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 16749 transitions. [2022-03-01 18:18:55,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 16749 transitions. [2022-03-01 18:18:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:55,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:55,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:55,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 18:18:55,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:55,594 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1074696534, now seen corresponding path program 16 times [2022-03-01 18:18:55,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:55,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004343307] [2022-03-01 18:18:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:55,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:55,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:55,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004343307] [2022-03-01 18:18:55,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004343307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:55,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610275268] [2022-03-01 18:18:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:18:55,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:55,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:55,628 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:55,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 18:18:55,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:18:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:18:55,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:55,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:55,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610275268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:55,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:55,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-01 18:18:55,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440890494] [2022-03-01 18:18:55,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:55,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 18:18:55,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 18:18:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-01 18:18:55,803 INFO L87 Difference]: Start difference. First operand 4687 states and 16749 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:56,101 INFO L93 Difference]: Finished difference Result 7410 states and 24751 transitions. [2022-03-01 18:18:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:18:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 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 27 [2022-03-01 18:18:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:56,117 INFO L225 Difference]: With dead ends: 7410 [2022-03-01 18:18:56,117 INFO L226 Difference]: Without dead ends: 7410 [2022-03-01 18:18:56,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:18:56,117 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:56,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 156 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:18:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-03-01 18:18:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 4582. [2022-03-01 18:18:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.563632394673652) internal successors, (16325), 4581 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16325 transitions. [2022-03-01 18:18:56,219 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16325 transitions. Word has length 27 [2022-03-01 18:18:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:56,220 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 16325 transitions. [2022-03-01 18:18:56,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16325 transitions. [2022-03-01 18:18:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:56,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:56,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:56,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 18:18:56,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 18:18:56,429 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 728117397, now seen corresponding path program 17 times [2022-03-01 18:18:56,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:56,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869445172] [2022-03-01 18:18:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:56,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:56,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869445172] [2022-03-01 18:18:56,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869445172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:56,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134210327] [2022-03-01 18:18:56,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:18:56,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:56,470 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:56,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 18:18:56,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:18:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:56,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:56,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:56,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:56,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134210327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:56,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:56,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-01 18:18:56,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034912810] [2022-03-01 18:18:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:56,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:56,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:56,709 INFO L87 Difference]: Start difference. First operand 4582 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:57,850 INFO L93 Difference]: Finished difference Result 12614 states and 40253 transitions. [2022-03-01 18:18:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 18:18:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:57,879 INFO L225 Difference]: With dead ends: 12614 [2022-03-01 18:18:57,879 INFO L226 Difference]: Without dead ends: 12614 [2022-03-01 18:18:57,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 18:18:57,880 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 549 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:57,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 215 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12614 states. [2022-03-01 18:18:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 4598. [2022-03-01 18:18:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.565151185555797) internal successors, (16389), 4597 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16389 transitions. [2022-03-01 18:18:58,045 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16389 transitions. Word has length 27 [2022-03-01 18:18:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:58,045 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16389 transitions. [2022-03-01 18:18:58,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16389 transitions. [2022-03-01 18:18:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:58,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:58,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:58,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 18:18:58,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:58,254 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash 538899099, now seen corresponding path program 18 times [2022-03-01 18:18:58,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:58,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500060234] [2022-03-01 18:18:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:58,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:58,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:58,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500060234] [2022-03-01 18:18:58,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500060234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:58,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115703912] [2022-03-01 18:18:58,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:18:58,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:58,299 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:58,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 18:18:58,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:18:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:18:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:18:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:18:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:18:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:18:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:58,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115703912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:18:58,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:18:58,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-01 18:18:58,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702197543] [2022-03-01 18:18:58,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:18:58,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 18:18:58,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:18:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 18:18:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-01 18:18:58,518 INFO L87 Difference]: Start difference. First operand 4598 states and 16389 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:18:59,505 INFO L93 Difference]: Finished difference Result 12094 states and 38855 transitions. [2022-03-01 18:18:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 18:18:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:18:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:18:59,533 INFO L225 Difference]: With dead ends: 12094 [2022-03-01 18:18:59,533 INFO L226 Difference]: Without dead ends: 12086 [2022-03-01 18:18:59,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=3272, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 18:18:59,534 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 610 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:18:59,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 210 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:18:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-01 18:18:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4592. [2022-03-01 18:18:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-01 18:18:59,735 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-01 18:18:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:18:59,735 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-01 18:18:59,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:18:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-01 18:18:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:18:59,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:18:59,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:18:59,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 18:18:59,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:59,943 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:18:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:18:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1928420315, now seen corresponding path program 19 times [2022-03-01 18:18:59,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:18:59,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845342250] [2022-03-01 18:18:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:18:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:18:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:18:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:18:59,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:18:59,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845342250] [2022-03-01 18:18:59,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845342250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:18:59,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646598316] [2022-03-01 18:18:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:18:59,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:18:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:18:59,980 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:18:59,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 18:19:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:00,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646598316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:00,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:00,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:19:00,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773330770] [2022-03-01 18:19:00,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:00,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:19:00,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:19:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:19:00,203 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:01,321 INFO L93 Difference]: Finished difference Result 10329 states and 32586 transitions. [2022-03-01 18:19:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:19:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:01,343 INFO L225 Difference]: With dead ends: 10329 [2022-03-01 18:19:01,343 INFO L226 Difference]: Without dead ends: 10329 [2022-03-01 18:19:01,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1236, Invalid=3876, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:19:01,344 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 843 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:01,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 244 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:19:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2022-03-01 18:19:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 4598. [2022-03-01 18:19:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.563845986512943) internal successors, (16383), 4597 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16383 transitions. [2022-03-01 18:19:01,467 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16383 transitions. Word has length 27 [2022-03-01 18:19:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:01,467 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16383 transitions. [2022-03-01 18:19:01,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16383 transitions. [2022-03-01 18:19:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:01,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:01,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:01,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 18:19:01,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 18:19:01,676 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -583897511, now seen corresponding path program 20 times [2022-03-01 18:19:01,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:01,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271316451] [2022-03-01 18:19:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:01,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271316451] [2022-03-01 18:19:01,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271316451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:01,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614513290] [2022-03-01 18:19:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:01,717 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:01,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 18:19:01,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:01,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614513290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:01,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:01,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-01 18:19:01,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171257699] [2022-03-01 18:19:01,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:01,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 18:19:01,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 18:19:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 18:19:01,943 INFO L87 Difference]: Start difference. First operand 4598 states and 16383 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:03,335 INFO L93 Difference]: Finished difference Result 10595 states and 33851 transitions. [2022-03-01 18:19:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 18:19:03,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:03,359 INFO L225 Difference]: With dead ends: 10595 [2022-03-01 18:19:03,359 INFO L226 Difference]: Without dead ends: 10587 [2022-03-01 18:19:03,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1514, Invalid=5968, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 18:19:03,360 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 743 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:03,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 262 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-03-01 18:19:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 4592. [2022-03-01 18:19:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-01 18:19:03,493 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-01 18:19:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:03,493 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-01 18:19:03,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-01 18:19:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:03,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:03,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:03,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:03,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 18:19:03,702 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1207160328, now seen corresponding path program 21 times [2022-03-01 18:19:03,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:03,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796055902] [2022-03-01 18:19:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:03,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:03,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:03,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796055902] [2022-03-01 18:19:03,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796055902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:03,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091881769] [2022-03-01 18:19:03,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:03,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:03,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:03,733 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:03,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 18:19:03,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:19:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:03,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:03,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091881769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:03,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:03,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 18:19:03,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238614714] [2022-03-01 18:19:03,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:03,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:19:03,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:03,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:19:03,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:19:03,923 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:04,222 INFO L93 Difference]: Finished difference Result 7411 states and 24660 transitions. [2022-03-01 18:19:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:19:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) 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 27 [2022-03-01 18:19:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:04,239 INFO L225 Difference]: With dead ends: 7411 [2022-03-01 18:19:04,239 INFO L226 Difference]: Without dead ends: 7411 [2022-03-01 18:19:04,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-03-01 18:19:04,239 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:04,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 167 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:19:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-03-01 18:19:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5288. [2022-03-01 18:19:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 3.5496500851144317) internal successors, (18767), 5287 states have internal predecessors, (18767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 18767 transitions. [2022-03-01 18:19:04,393 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 18767 transitions. Word has length 27 [2022-03-01 18:19:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:04,393 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 18767 transitions. [2022-03-01 18:19:04,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 18767 transitions. [2022-03-01 18:19:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:04,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:04,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:04,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 18:19:04,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 18:19:04,601 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 459370969, now seen corresponding path program 22 times [2022-03-01 18:19:04,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:04,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709373682] [2022-03-01 18:19:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:04,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:04,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709373682] [2022-03-01 18:19:04,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709373682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:04,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531933881] [2022-03-01 18:19:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:04,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:04,641 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:04,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 18:19:04,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:04,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:04,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:04,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531933881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:04,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:04,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:19:04,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229028109] [2022-03-01 18:19:04,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:04,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:19:04,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:19:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:19:04,816 INFO L87 Difference]: Start difference. First operand 5288 states and 18767 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:05,514 INFO L93 Difference]: Finished difference Result 12338 states and 40499 transitions. [2022-03-01 18:19:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 18:19:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:05,546 INFO L225 Difference]: With dead ends: 12338 [2022-03-01 18:19:05,546 INFO L226 Difference]: Without dead ends: 12338 [2022-03-01 18:19:05,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 18:19:05,547 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 484 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 160 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:19:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-03-01 18:19:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 6120. [2022-03-01 18:19:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.566268998202321) internal successors, (21822), 6119 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 21822 transitions. [2022-03-01 18:19:05,807 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 21822 transitions. Word has length 27 [2022-03-01 18:19:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:05,808 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 21822 transitions. [2022-03-01 18:19:05,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 21822 transitions. [2022-03-01 18:19:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:05,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:05,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:05,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 18:19:06,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 18:19:06,034 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 270152671, now seen corresponding path program 23 times [2022-03-01 18:19:06,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:06,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927500061] [2022-03-01 18:19:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:06,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:06,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927500061] [2022-03-01 18:19:06,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927500061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:06,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157755478] [2022-03-01 18:19:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:06,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:06,073 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:06,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 18:19:06,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:19:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:06,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:06,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157755478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:06,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:06,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:19:06,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170045950] [2022-03-01 18:19:06,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:06,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:19:06,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:19:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:19:06,255 INFO L87 Difference]: Start difference. First operand 6120 states and 21822 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:06,895 INFO L93 Difference]: Finished difference Result 11967 states and 39549 transitions. [2022-03-01 18:19:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:19:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:06,922 INFO L225 Difference]: With dead ends: 11967 [2022-03-01 18:19:06,923 INFO L226 Difference]: Without dead ends: 11959 [2022-03-01 18:19:06,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 18:19:06,923 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 479 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:06,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 165 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:19:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2022-03-01 18:19:07,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 6112. [2022-03-01 18:19:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.5660284732449683) internal successors, (21792), 6111 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21792 transitions. [2022-03-01 18:19:07,096 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21792 transitions. Word has length 27 [2022-03-01 18:19:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:07,097 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 21792 transitions. [2022-03-01 18:19:07,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21792 transitions. [2022-03-01 18:19:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:07,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:07,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:07,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 18:19:07,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 18:19:07,306 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -941485803, now seen corresponding path program 9 times [2022-03-01 18:19:07,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:07,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623841405] [2022-03-01 18:19:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:07,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:07,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623841405] [2022-03-01 18:19:07,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623841405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:07,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901817147] [2022-03-01 18:19:07,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:07,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:07,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:07,345 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:07,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 18:19:07,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:19:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:19:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:07,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:07,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901817147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:07,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:07,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-03-01 18:19:07,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786994206] [2022-03-01 18:19:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:19:07,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:19:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:19:07,491 INFO L87 Difference]: Start difference. First operand 6112 states and 21792 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:07,759 INFO L93 Difference]: Finished difference Result 7455 states and 25610 transitions. [2022-03-01 18:19:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 18:19:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:07,777 INFO L225 Difference]: With dead ends: 7455 [2022-03-01 18:19:07,777 INFO L226 Difference]: Without dead ends: 7455 [2022-03-01 18:19:07,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-01 18:19:07,777 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:07,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 102 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 18:19:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-03-01 18:19:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6153. [2022-03-01 18:19:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 3.5640442132639794) internal successors, (21926), 6152 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21926 transitions. [2022-03-01 18:19:07,902 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21926 transitions. Word has length 27 [2022-03-01 18:19:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:07,903 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 21926 transitions. [2022-03-01 18:19:07,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21926 transitions. [2022-03-01 18:19:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:07,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:07,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:07,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:08,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:08,137 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 913534931, now seen corresponding path program 24 times [2022-03-01 18:19:08,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:08,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129441211] [2022-03-01 18:19:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:08,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:08,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129441211] [2022-03-01 18:19:08,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129441211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:08,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569360304] [2022-03-01 18:19:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:08,174 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) [2022-03-01 18:19:08,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 18:19:08,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:19:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:08,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:08,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569360304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:08,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:08,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-01 18:19:08,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094323506] [2022-03-01 18:19:08,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:08,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:19:08,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:19:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:19:08,340 INFO L87 Difference]: Start difference. First operand 6153 states and 21926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:08,879 INFO L93 Difference]: Finished difference Result 11867 states and 39346 transitions. [2022-03-01 18:19:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 18:19:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:08,906 INFO L225 Difference]: With dead ends: 11867 [2022-03-01 18:19:08,906 INFO L226 Difference]: Without dead ends: 11835 [2022-03-01 18:19:08,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 18:19:08,907 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 553 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:08,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 120 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:19:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-03-01 18:19:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6181. [2022-03-01 18:19:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 3.5611650485436894) internal successors, (22008), 6180 states have internal predecessors, (22008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 22008 transitions. [2022-03-01 18:19:09,131 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 22008 transitions. Word has length 27 [2022-03-01 18:19:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:09,131 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 22008 transitions. [2022-03-01 18:19:09,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 22008 transitions. [2022-03-01 18:19:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:09,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:09,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:09,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 18:19:09,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:09,340 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1225890903, now seen corresponding path program 25 times [2022-03-01 18:19:09,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:09,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308999149] [2022-03-01 18:19:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308999149] [2022-03-01 18:19:09,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308999149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:09,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240981602] [2022-03-01 18:19:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:09,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:09,383 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:09,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 18:19:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:09,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:09,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:09,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240981602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:09,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:09,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:19:09,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136720447] [2022-03-01 18:19:09,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:09,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:19:09,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:19:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:19:09,600 INFO L87 Difference]: Start difference. First operand 6181 states and 22008 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:10,992 INFO L93 Difference]: Finished difference Result 11509 states and 36905 transitions. [2022-03-01 18:19:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 18:19:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:11,018 INFO L225 Difference]: With dead ends: 11509 [2022-03-01 18:19:11,018 INFO L226 Difference]: Without dead ends: 11509 [2022-03-01 18:19:11,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1502, Invalid=5808, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 18:19:11,020 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 779 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:11,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 343 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2022-03-01 18:19:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6427. [2022-03-01 18:19:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.541083099906629) internal successors, (22755), 6426 states have internal predecessors, (22755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 22755 transitions. [2022-03-01 18:19:11,240 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 22755 transitions. Word has length 27 [2022-03-01 18:19:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:11,241 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 22755 transitions. [2022-03-01 18:19:11,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 22755 transitions. [2022-03-01 18:19:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:11,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:11,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:11,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 18:19:11,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:11,450 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1286426923, now seen corresponding path program 26 times [2022-03-01 18:19:11,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:11,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327034776] [2022-03-01 18:19:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:11,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:11,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:11,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327034776] [2022-03-01 18:19:11,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327034776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:11,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225866814] [2022-03-01 18:19:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:11,491 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:11,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 18:19:11,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:11,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225866814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:11,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:11,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 18:19:11,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13107158] [2022-03-01 18:19:11,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:19:11,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:19:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:19:11,704 INFO L87 Difference]: Start difference. First operand 6427 states and 22755 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:13,059 INFO L93 Difference]: Finished difference Result 11437 states and 37488 transitions. [2022-03-01 18:19:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 18:19:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:13,084 INFO L225 Difference]: With dead ends: 11437 [2022-03-01 18:19:13,084 INFO L226 Difference]: Without dead ends: 11429 [2022-03-01 18:19:13,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1456, Invalid=6200, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:19:13,085 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 789 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:13,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 241 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2022-03-01 18:19:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 6417. [2022-03-01 18:19:13,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6416 states have (on average 3.5395885286783044) internal successors, (22710), 6416 states have internal predecessors, (22710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 22710 transitions. [2022-03-01 18:19:13,307 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 22710 transitions. Word has length 27 [2022-03-01 18:19:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:13,308 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 22710 transitions. [2022-03-01 18:19:13,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 22710 transitions. [2022-03-01 18:19:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:13,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:13,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:13,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 18:19:13,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:13,518 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2131398375, now seen corresponding path program 27 times [2022-03-01 18:19:13,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:13,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809759982] [2022-03-01 18:19:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:13,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:13,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809759982] [2022-03-01 18:19:13,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809759982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:13,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105830768] [2022-03-01 18:19:13,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:19:13,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:13,560 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:13,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 18:19:13,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:19:13,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:13,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105830768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:13,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:13,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:19:13,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043554405] [2022-03-01 18:19:13,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:13,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:19:13,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:19:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:19:13,762 INFO L87 Difference]: Start difference. First operand 6417 states and 22710 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:14,842 INFO L93 Difference]: Finished difference Result 10978 states and 36562 transitions. [2022-03-01 18:19:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-01 18:19:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:14,866 INFO L225 Difference]: With dead ends: 10978 [2022-03-01 18:19:14,866 INFO L226 Difference]: Without dead ends: 10946 [2022-03-01 18:19:14,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=932, Invalid=3624, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 18:19:14,867 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:14,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 210 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:19:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-03-01 18:19:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 6457. [2022-03-01 18:19:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6457 states, 6456 states have (on average 3.5353159851301115) internal successors, (22824), 6456 states have internal predecessors, (22824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 22824 transitions. [2022-03-01 18:19:15,031 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 22824 transitions. Word has length 27 [2022-03-01 18:19:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:15,032 INFO L470 AbstractCegarLoop]: Abstraction has 6457 states and 22824 transitions. [2022-03-01 18:19:15,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 22824 transitions. [2022-03-01 18:19:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:15,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:15,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:15,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 18:19:15,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-01 18:19:15,241 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:15,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1828165507, now seen corresponding path program 28 times [2022-03-01 18:19:15,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:15,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693572272] [2022-03-01 18:19:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:15,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:15,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693572272] [2022-03-01 18:19:15,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693572272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:15,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868659760] [2022-03-01 18:19:15,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:15,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:15,283 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:15,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 18:19:15,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:15,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:15,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:15,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868659760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:15,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:15,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-01 18:19:15,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892293591] [2022-03-01 18:19:15,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:19:15,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:15,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:19:15,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:19:15,482 INFO L87 Difference]: Start difference. First operand 6457 states and 22824 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:16,144 INFO L93 Difference]: Finished difference Result 9242 states and 30901 transitions. [2022-03-01 18:19:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 18:19:16,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:16,163 INFO L225 Difference]: With dead ends: 9242 [2022-03-01 18:19:16,163 INFO L226 Difference]: Without dead ends: 9242 [2022-03-01 18:19:16,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:19:16,164 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 310 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:16,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 196 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 18:19:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-03-01 18:19:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 6587. [2022-03-01 18:19:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 3.5252049802611602) internal successors, (23217), 6586 states have internal predecessors, (23217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 23217 transitions. [2022-03-01 18:19:16,303 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 23217 transitions. Word has length 27 [2022-03-01 18:19:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:16,303 INFO L470 AbstractCegarLoop]: Abstraction has 6587 states and 23217 transitions. [2022-03-01 18:19:16,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 23217 transitions. [2022-03-01 18:19:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:16,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:16,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:16,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 18:19:16,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 18:19:16,512 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1881628206, now seen corresponding path program 18 times [2022-03-01 18:19:16,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:16,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792019006] [2022-03-01 18:19:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:16,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792019006] [2022-03-01 18:19:16,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792019006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:16,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802262704] [2022-03-01 18:19:16,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:16,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:16,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:16,562 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 18:19:16,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:19:16,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:16,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802262704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:16,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:16,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:19:16,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930740380] [2022-03-01 18:19:16,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:16,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:19:16,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:19:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:19:16,721 INFO L87 Difference]: Start difference. First operand 6587 states and 23217 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:17,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:17,152 INFO L93 Difference]: Finished difference Result 11132 states and 37515 transitions. [2022-03-01 18:19:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 18:19:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:17,177 INFO L225 Difference]: With dead ends: 11132 [2022-03-01 18:19:17,177 INFO L226 Difference]: Without dead ends: 11132 [2022-03-01 18:19:17,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:19:17,178 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:17,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 131 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:19:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-03-01 18:19:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 6717. [2022-03-01 18:19:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.5132519356759975) internal successors, (23595), 6716 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 23595 transitions. [2022-03-01 18:19:17,340 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 23595 transitions. Word has length 27 [2022-03-01 18:19:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:17,340 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 23595 transitions. [2022-03-01 18:19:17,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 23595 transitions. [2022-03-01 18:19:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:17,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:17,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:17,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 18:19:17,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 18:19:17,550 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2088141458, now seen corresponding path program 19 times [2022-03-01 18:19:17,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:17,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628440382] [2022-03-01 18:19:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:17,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:17,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628440382] [2022-03-01 18:19:17,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628440382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:17,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61892284] [2022-03-01 18:19:17,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:17,588 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:17,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 18:19:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:17,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:19:17,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61892284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:17,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:17,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-01 18:19:17,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246435568] [2022-03-01 18:19:17,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:17,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 18:19:17,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 18:19:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-01 18:19:17,759 INFO L87 Difference]: Start difference. First operand 6717 states and 23595 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:18,102 INFO L93 Difference]: Finished difference Result 9155 states and 31004 transitions. [2022-03-01 18:19:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:19:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:18,121 INFO L225 Difference]: With dead ends: 9155 [2022-03-01 18:19:18,121 INFO L226 Difference]: Without dead ends: 9145 [2022-03-01 18:19:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:19:18,122 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:18,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 254 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:19:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-03-01 18:19:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 6962. [2022-03-01 18:19:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.5207585117080877) internal successors, (24508), 6961 states have internal predecessors, (24508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 24508 transitions. [2022-03-01 18:19:18,263 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 24508 transitions. Word has length 27 [2022-03-01 18:19:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:18,264 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 24508 transitions. [2022-03-01 18:19:18,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 24508 transitions. [2022-03-01 18:19:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:18,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:18,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:18,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 18:19:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:18,475 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1818737390, now seen corresponding path program 20 times [2022-03-01 18:19:18,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:18,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595258915] [2022-03-01 18:19:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595258915] [2022-03-01 18:19:18,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595258915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092342949] [2022-03-01 18:19:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:19:18,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:18,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:18,516 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:18,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 18:19:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:19:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 18:19:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:18,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092342949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:18,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:18,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-01 18:19:18,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743653700] [2022-03-01 18:19:18,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:18,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 18:19:18,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 18:19:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 18:19:18,656 INFO L87 Difference]: Start difference. First operand 6962 states and 24508 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:19,052 INFO L93 Difference]: Finished difference Result 11751 states and 39739 transitions. [2022-03-01 18:19:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 18:19:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:19,080 INFO L225 Difference]: With dead ends: 11751 [2022-03-01 18:19:19,080 INFO L226 Difference]: Without dead ends: 11735 [2022-03-01 18:19:19,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:19:19,081 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:19,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 137 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:19:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-03-01 18:19:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 7106. [2022-03-01 18:19:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7105 states have (on average 3.5073891625615765) internal successors, (24920), 7105 states have internal predecessors, (24920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 24920 transitions. [2022-03-01 18:19:19,277 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 24920 transitions. Word has length 27 [2022-03-01 18:19:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:19,277 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 24920 transitions. [2022-03-01 18:19:19,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 24920 transitions. [2022-03-01 18:19:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 18:19:19,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:19,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:19,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 18:19:19,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:19,489 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1104222989, now seen corresponding path program 10 times [2022-03-01 18:19:19,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:19,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551410664] [2022-03-01 18:19:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:19,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:19,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551410664] [2022-03-01 18:19:19,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551410664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:19,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233861501] [2022-03-01 18:19:19,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:19:19,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:19,538 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:19,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 18:19:19,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:19:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 18:19:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:19,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:19,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233861501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:19,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:19,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 18:19:19,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874734303] [2022-03-01 18:19:19,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 18:19:19,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 18:19:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 18:19:19,708 INFO L87 Difference]: Start difference. First operand 7106 states and 24920 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:20,077 INFO L93 Difference]: Finished difference Result 8555 states and 28945 transitions. [2022-03-01 18:19:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:19:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 18:19:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:20,097 INFO L225 Difference]: With dead ends: 8555 [2022-03-01 18:19:20,097 INFO L226 Difference]: Without dead ends: 8555 [2022-03-01 18:19:20,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-03-01 18:19:20,098 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:20,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 111 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:19:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-03-01 18:19:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 7022. [2022-03-01 18:19:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 3.5060532687651333) internal successors, (24616), 7021 states have internal predecessors, (24616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 24616 transitions. [2022-03-01 18:19:20,243 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 24616 transitions. Word has length 27 [2022-03-01 18:19:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:20,243 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 24616 transitions. [2022-03-01 18:19:20,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:20,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 24616 transitions. [2022-03-01 18:19:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:20,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:20,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:20,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 18:19:20,456 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1885222371, now seen corresponding path program 29 times [2022-03-01 18:19:20,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:20,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474598765] [2022-03-01 18:19:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474598765] [2022-03-01 18:19:20,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474598765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216489800] [2022-03-01 18:19:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:20,628 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:20,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 18:19:20,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:19:20,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 18:19:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:20,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-03-01 18:19:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:20,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:21,050 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:19:21,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-03-01 18:19:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:21,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:21,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-01 18:19:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:21,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216489800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:21,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:21,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-03-01 18:19:21,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542169078] [2022-03-01 18:19:21,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:21,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 18:19:21,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:21,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 18:19:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:19:21,170 INFO L87 Difference]: Start difference. First operand 7022 states and 24616 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) 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) [2022-03-01 18:19:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:21,442 INFO L93 Difference]: Finished difference Result 7838 states and 27083 transitions. [2022-03-01 18:19:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 18:19:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) 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 30 [2022-03-01 18:19:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:21,460 INFO L225 Difference]: With dead ends: 7838 [2022-03-01 18:19:21,461 INFO L226 Difference]: Without dead ends: 7769 [2022-03-01 18:19:21,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 18:19:21,461 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:21,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 371 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 18:19:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7769 states. [2022-03-01 18:19:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7769 to 7214. [2022-03-01 18:19:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7214 states, 7213 states have (on average 3.501178427838625) internal successors, (25254), 7213 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 25254 transitions. [2022-03-01 18:19:21,607 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 25254 transitions. Word has length 30 [2022-03-01 18:19:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 25254 transitions. [2022-03-01 18:19:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) 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) [2022-03-01 18:19:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 25254 transitions. [2022-03-01 18:19:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:21,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:21,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:21,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 18:19:21,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:21,821 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash -428025768, now seen corresponding path program 11 times [2022-03-01 18:19:21,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:21,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961955684] [2022-03-01 18:19:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:21,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:22,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:22,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961955684] [2022-03-01 18:19:22,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961955684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:22,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774239477] [2022-03-01 18:19:22,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:19:22,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:22,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:22,174 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:22,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 18:19:22,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:19:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:19:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:22,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:22,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:19:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:22,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:22,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:22,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:22,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:19:23,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:23,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:23,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:23,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:19:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:23,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774239477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:23,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:23,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-01 18:19:23,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327003890] [2022-03-01 18:19:23,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:23,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:19:23,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:19:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:19:23,282 INFO L87 Difference]: Start difference. First operand 7214 states and 25254 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:30,616 INFO L93 Difference]: Finished difference Result 12273 states and 38840 transitions. [2022-03-01 18:19:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 18:19:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:30,645 INFO L225 Difference]: With dead ends: 12273 [2022-03-01 18:19:30,645 INFO L226 Difference]: Without dead ends: 12228 [2022-03-01 18:19:30,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2071, Invalid=13181, Unknown=0, NotChecked=0, Total=15252 [2022-03-01 18:19:30,647 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 824 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:30,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 767 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:19:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12228 states. [2022-03-01 18:19:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12228 to 7230. [2022-03-01 18:19:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.5000691658597316) internal successors, (25302), 7229 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25302 transitions. [2022-03-01 18:19:30,866 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25302 transitions. Word has length 30 [2022-03-01 18:19:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:30,866 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25302 transitions. [2022-03-01 18:19:30,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25302 transitions. [2022-03-01 18:19:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:30,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:30,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:30,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 18:19:31,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:31,078 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 999153544, now seen corresponding path program 12 times [2022-03-01 18:19:31,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:31,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489968491] [2022-03-01 18:19:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:31,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:31,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:31,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489968491] [2022-03-01 18:19:31,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489968491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:31,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900676264] [2022-03-01 18:19:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:19:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:31,429 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:31,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 18:19:31,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:19:31,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:19:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:19:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:31,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:31,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-01 18:19:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:32,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:32,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:32,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:19:32,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:32,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-01 18:19:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:32,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900676264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:32,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:32,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-01 18:19:32,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404475030] [2022-03-01 18:19:32,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:32,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:19:32,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:19:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:19:32,682 INFO L87 Difference]: Start difference. First operand 7230 states and 25302 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:19:55,545 INFO L93 Difference]: Finished difference Result 14121 states and 45782 transitions. [2022-03-01 18:19:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-03-01 18:19:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:19:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:19:55,576 INFO L225 Difference]: With dead ends: 14121 [2022-03-01 18:19:55,576 INFO L226 Difference]: Without dead ends: 14080 [2022-03-01 18:19:55,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27018 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=6199, Invalid=61141, Unknown=0, NotChecked=0, Total=67340 [2022-03-01 18:19:55,580 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1291 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 6104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 5543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:19:55,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1092 Invalid, 6104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 5543 Invalid, 0 Unknown, 172 Unchecked, 3.0s Time] [2022-03-01 18:19:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2022-03-01 18:19:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 7421. [2022-03-01 18:19:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7421 states, 7420 states have (on average 3.494070080862534) internal successors, (25926), 7420 states have internal predecessors, (25926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 25926 transitions. [2022-03-01 18:19:55,765 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 25926 transitions. Word has length 30 [2022-03-01 18:19:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:19:55,765 INFO L470 AbstractCegarLoop]: Abstraction has 7421 states and 25926 transitions. [2022-03-01 18:19:55,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:19:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 25926 transitions. [2022-03-01 18:19:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:19:55,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:19:55,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:19:55,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 18:19:55,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-01 18:19:55,979 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:19:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:19:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1036021596, now seen corresponding path program 13 times [2022-03-01 18:19:55,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:19:55,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465105518] [2022-03-01 18:19:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:19:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:19:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:56,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:19:56,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465105518] [2022-03-01 18:19:56,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465105518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:19:56,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19014265] [2022-03-01 18:19:56,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:19:56,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:19:56,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:19:56,400 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:19:56,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 18:19:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:19:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:19:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:19:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:19:56,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:56,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-01 18:19:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:19:57,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:57,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:57,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:19:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:19:57,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:19:57,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:19:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:19:57,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19014265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:19:57,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:19:57,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 18:19:57,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748554269] [2022-03-01 18:19:57,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:19:57,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:19:57,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:19:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:19:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:19:57,437 INFO L87 Difference]: Start difference. First operand 7421 states and 25926 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:03,149 INFO L93 Difference]: Finished difference Result 12007 states and 38257 transitions. [2022-03-01 18:20:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-01 18:20:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:03,181 INFO L225 Difference]: With dead ends: 12007 [2022-03-01 18:20:03,182 INFO L226 Difference]: Without dead ends: 12004 [2022-03-01 18:20:03,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1850, Invalid=11260, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 18:20:03,183 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 793 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:03,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 561 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:20:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2022-03-01 18:20:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 7411. [2022-03-01 18:20:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.494871794871795) internal successors, (25897), 7410 states have internal predecessors, (25897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25897 transitions. [2022-03-01 18:20:03,380 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25897 transitions. Word has length 30 [2022-03-01 18:20:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:03,380 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 25897 transitions. [2022-03-01 18:20:03,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25897 transitions. [2022-03-01 18:20:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:03,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:03,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:03,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 18:20:03,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:03,593 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1895398836, now seen corresponding path program 14 times [2022-03-01 18:20:03,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:03,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118747704] [2022-03-01 18:20:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:03,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:03,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118747704] [2022-03-01 18:20:03,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118747704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:03,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121081525] [2022-03-01 18:20:03,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:20:03,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:03,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:03,964 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:03,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 18:20:03,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:20:03,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:20:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:04,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:04,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-01 18:20:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:04,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:04,693 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:20:04,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:20:04,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:04,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:04,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:04,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:20:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:05,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121081525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:05,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:05,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 18:20:05,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518105796] [2022-03-01 18:20:05,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:05,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:05,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:20:05,030 INFO L87 Difference]: Start difference. First operand 7411 states and 25897 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:11,320 INFO L93 Difference]: Finished difference Result 12598 states and 40741 transitions. [2022-03-01 18:20:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-01 18:20:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:11,348 INFO L225 Difference]: With dead ends: 12598 [2022-03-01 18:20:11,348 INFO L226 Difference]: Without dead ends: 12439 [2022-03-01 18:20:11,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1366, Invalid=11516, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:20:11,350 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 677 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 3783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:11,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 876 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3011 Invalid, 0 Unknown, 616 Unchecked, 1.5s Time] [2022-03-01 18:20:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2022-03-01 18:20:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 7481. [2022-03-01 18:20:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7481 states, 7480 states have (on average 3.4958556149732622) internal successors, (26149), 7480 states have internal predecessors, (26149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 26149 transitions. [2022-03-01 18:20:11,599 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 26149 transitions. Word has length 30 [2022-03-01 18:20:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 26149 transitions. [2022-03-01 18:20:11,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 26149 transitions. [2022-03-01 18:20:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:11,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:11,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:11,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 18:20:11,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 18:20:11,812 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash 491925475, now seen corresponding path program 21 times [2022-03-01 18:20:11,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:11,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915577875] [2022-03-01 18:20:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:12,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:12,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915577875] [2022-03-01 18:20:12,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915577875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:12,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623851966] [2022-03-01 18:20:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:12,236 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:12,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 18:20:12,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:20:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:20:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-03-01 18:20:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:12,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:12,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:12,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-03-01 18:20:13,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:13,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:13,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:20:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:13,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623851966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:13,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:13,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-03-01 18:20:13,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485114122] [2022-03-01 18:20:13,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:13,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:20:13,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:20:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:20:13,100 INFO L87 Difference]: Start difference. First operand 7481 states and 26149 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:22,781 INFO L93 Difference]: Finished difference Result 12701 states and 41359 transitions. [2022-03-01 18:20:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-01 18:20:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:22,813 INFO L225 Difference]: With dead ends: 12701 [2022-03-01 18:20:22,814 INFO L226 Difference]: Without dead ends: 12654 [2022-03-01 18:20:22,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2795, Invalid=23611, Unknown=0, NotChecked=0, Total=26406 [2022-03-01 18:20:22,816 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 972 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 4553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:22,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1095 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:20:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12654 states. [2022-03-01 18:20:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12654 to 7785. [2022-03-01 18:20:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 3.4771325796505654) internal successors, (27066), 7784 states have internal predecessors, (27066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 27066 transitions. [2022-03-01 18:20:23,101 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 27066 transitions. Word has length 30 [2022-03-01 18:20:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:23,102 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 27066 transitions. [2022-03-01 18:20:23,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 27066 transitions. [2022-03-01 18:20:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:23,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:23,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:23,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 18:20:23,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 18:20:23,316 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:23,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2120239378, now seen corresponding path program 15 times [2022-03-01 18:20:23,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:23,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440944256] [2022-03-01 18:20:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:23,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:23,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:23,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440944256] [2022-03-01 18:20:23,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440944256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:23,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173511215] [2022-03-01 18:20:23,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:20:23,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:23,613 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:23,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 18:20:23,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:20:23,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:20:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:24,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-01 18:20:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:24,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:24,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 68 [2022-03-01 18:20:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:25,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173511215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:25,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:25,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-01 18:20:25,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970019020] [2022-03-01 18:20:25,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:25,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:20:25,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:20:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:20:25,201 INFO L87 Difference]: Start difference. First operand 7785 states and 27066 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:29,494 INFO L93 Difference]: Finished difference Result 12241 states and 39290 transitions. [2022-03-01 18:20:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 18:20:29,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:29,522 INFO L225 Difference]: With dead ends: 12241 [2022-03-01 18:20:29,522 INFO L226 Difference]: Without dead ends: 12223 [2022-03-01 18:20:29,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1561, Invalid=9151, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:20:29,523 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 592 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 967 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:29,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 453 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1085 Invalid, 0 Unknown, 967 Unchecked, 0.6s Time] [2022-03-01 18:20:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12223 states. [2022-03-01 18:20:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12223 to 7791. [2022-03-01 18:20:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7791 states, 7790 states have (on average 3.477535301668806) internal successors, (27090), 7790 states have internal predecessors, (27090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 27090 transitions. [2022-03-01 18:20:29,757 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 27090 transitions. Word has length 30 [2022-03-01 18:20:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:29,757 INFO L470 AbstractCegarLoop]: Abstraction has 7791 states and 27090 transitions. [2022-03-01 18:20:29,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 27090 transitions. [2022-03-01 18:20:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:29,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:29,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:29,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-01 18:20:29,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:29,971 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash 680823678, now seen corresponding path program 16 times [2022-03-01 18:20:29,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:29,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861239484] [2022-03-01 18:20:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861239484] [2022-03-01 18:20:30,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861239484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995122863] [2022-03-01 18:20:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:20:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:30,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:30,250 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 18:20:30,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:20:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:20:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:30,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-01 18:20:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:30,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:30,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:30,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:20:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:31,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:31,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:20:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:31,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995122863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:31,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:31,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:20:31,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732567271] [2022-03-01 18:20:31,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:31,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:20:31,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:20:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:20:31,319 INFO L87 Difference]: Start difference. First operand 7791 states and 27090 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:37,963 INFO L93 Difference]: Finished difference Result 13671 states and 42804 transitions. [2022-03-01 18:20:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-01 18:20:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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 30 [2022-03-01 18:20:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:37,994 INFO L225 Difference]: With dead ends: 13671 [2022-03-01 18:20:37,994 INFO L226 Difference]: Without dead ends: 13626 [2022-03-01 18:20:37,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6376 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2443, Invalid=14327, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:20:37,995 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1008 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:37,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 700 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2356 Invalid, 0 Unknown, 197 Unchecked, 1.3s Time] [2022-03-01 18:20:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2022-03-01 18:20:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 7812. [2022-03-01 18:20:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 7811 states have (on average 3.4771476123415694) internal successors, (27160), 7811 states have internal predecessors, (27160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 27160 transitions. [2022-03-01 18:20:38,189 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 27160 transitions. Word has length 30 [2022-03-01 18:20:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:38,189 INFO L470 AbstractCegarLoop]: Abstraction has 7812 states and 27160 transitions. [2022-03-01 18:20:38,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 27160 transitions. [2022-03-01 18:20:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:38,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:38,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:38,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 18:20:38,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:38,404 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash 550383676, now seen corresponding path program 17 times [2022-03-01 18:20:38,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:38,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546720972] [2022-03-01 18:20:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:38,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:38,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:38,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546720972] [2022-03-01 18:20:38,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546720972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:38,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799993816] [2022-03-01 18:20:38,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:20:38,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:38,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:38,689 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:38,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 18:20:38,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:20:38,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:38,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:20:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:39,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-03-01 18:20:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:39,390 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:20:39,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:20:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:39,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:39,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:39,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:20:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:39,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799993816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:39,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:39,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:20:39,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770757059] [2022-03-01 18:20:39,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:39,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:39,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:39,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:39,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:20:39,712 INFO L87 Difference]: Start difference. First operand 7812 states and 27160 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:45,766 INFO L93 Difference]: Finished difference Result 12966 states and 41867 transitions. [2022-03-01 18:20:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:20:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:45,794 INFO L225 Difference]: With dead ends: 12966 [2022-03-01 18:20:45,794 INFO L226 Difference]: Without dead ends: 12921 [2022-03-01 18:20:45,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4117 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1195, Invalid=11015, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 18:20:45,796 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 574 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:45,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 799 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 18:20:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2022-03-01 18:20:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 7830. [2022-03-01 18:20:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 7829 states have (on average 3.4775833439775194) internal successors, (27226), 7829 states have internal predecessors, (27226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 27226 transitions. [2022-03-01 18:20:46,044 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 27226 transitions. Word has length 30 [2022-03-01 18:20:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:46,045 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 27226 transitions. [2022-03-01 18:20:46,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 27226 transitions. [2022-03-01 18:20:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:46,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:46,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:46,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 18:20:46,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 18:20:46,258 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash -168495444, now seen corresponding path program 18 times [2022-03-01 18:20:46,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:46,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590682355] [2022-03-01 18:20:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:46,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:46,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:46,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590682355] [2022-03-01 18:20:46,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590682355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:46,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097416542] [2022-03-01 18:20:46,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:20:46,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:46,574 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:46,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 18:20:46,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:20:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:20:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:20:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:46,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:46,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:46,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-01 18:20:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:46,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:47,264 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:20:47,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:20:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:47,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:47,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:47,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:20:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:47,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097416542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:47,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:47,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 18:20:47,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327108249] [2022-03-01 18:20:47,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:47,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:20:47,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:20:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:20:47,624 INFO L87 Difference]: Start difference. First operand 7830 states and 27226 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:20:55,691 INFO L93 Difference]: Finished difference Result 14476 states and 46100 transitions. [2022-03-01 18:20:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-01 18:20:55,691 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:20:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:20:55,721 INFO L225 Difference]: With dead ends: 14476 [2022-03-01 18:20:55,721 INFO L226 Difference]: Without dead ends: 14343 [2022-03-01 18:20:55,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1887, Invalid=16473, Unknown=0, NotChecked=0, Total=18360 [2022-03-01 18:20:55,722 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 902 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 4562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:20:55,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1235 Invalid, 4562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3929 Invalid, 0 Unknown, 437 Unchecked, 1.9s Time] [2022-03-01 18:20:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2022-03-01 18:20:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 7848. [2022-03-01 18:20:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.4794188861985473) internal successors, (27303), 7847 states have internal predecessors, (27303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 27303 transitions. [2022-03-01 18:20:55,919 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 27303 transitions. Word has length 30 [2022-03-01 18:20:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:20:55,919 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 27303 transitions. [2022-03-01 18:20:55,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:20:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 27303 transitions. [2022-03-01 18:20:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:20:55,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:20:55,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:20:55,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 18:20:56,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 18:20:56,133 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:20:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:20:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash -815268852, now seen corresponding path program 19 times [2022-03-01 18:20:56,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:20:56,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108028419] [2022-03-01 18:20:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:20:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:20:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:56,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:20:56,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108028419] [2022-03-01 18:20:56,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108028419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:20:56,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572123091] [2022-03-01 18:20:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:20:56,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:20:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:20:56,407 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:20:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 18:20:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:20:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:20:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:20:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:20:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:56,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:20:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:56,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:20:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:57,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:57,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:20:57,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:20:57,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:20:57,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:20:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:20:57,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572123091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:20:57,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:20:57,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:20:57,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172872990] [2022-03-01 18:20:57,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:20:57,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:20:57,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:20:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:20:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:20:57,524 INFO L87 Difference]: Start difference. First operand 7848 states and 27303 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:03,947 INFO L93 Difference]: Finished difference Result 12337 states and 39312 transitions. [2022-03-01 18:21:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-01 18:21:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:03,975 INFO L225 Difference]: With dead ends: 12337 [2022-03-01 18:21:03,975 INFO L226 Difference]: Without dead ends: 12292 [2022-03-01 18:21:03,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4815 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1642, Invalid=11930, Unknown=0, NotChecked=0, Total=13572 [2022-03-01 18:21:03,976 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 855 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:03,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 716 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:21:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12292 states. [2022-03-01 18:21:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12292 to 7843. [2022-03-01 18:21:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7843 states, 7842 states have (on average 3.479597041571028) internal successors, (27287), 7842 states have internal predecessors, (27287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7843 states to 7843 states and 27287 transitions. [2022-03-01 18:21:04,167 INFO L78 Accepts]: Start accepts. Automaton has 7843 states and 27287 transitions. Word has length 30 [2022-03-01 18:21:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:04,167 INFO L470 AbstractCegarLoop]: Abstraction has 7843 states and 27287 transitions. [2022-03-01 18:21:04,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7843 states and 27287 transitions. [2022-03-01 18:21:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:04,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:04,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:04,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 18:21:04,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:04,414 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1901164380, now seen corresponding path program 20 times [2022-03-01 18:21:04,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:04,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687272267] [2022-03-01 18:21:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:04,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:04,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687272267] [2022-03-01 18:21:04,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687272267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:04,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759344455] [2022-03-01 18:21:04,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:21:04,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:04,733 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:04,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 18:21:04,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:21:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:04,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:21:04,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:05,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:05,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:05,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-01 18:21:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:05,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:05,475 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:21:05,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:05,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:05,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:05,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:05,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:05,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759344455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:05,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:05,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:21:05,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789643859] [2022-03-01 18:21:05,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:05,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:21:05,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:21:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:05,777 INFO L87 Difference]: Start difference. First operand 7843 states and 27287 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:13,077 INFO L93 Difference]: Finished difference Result 14596 states and 46967 transitions. [2022-03-01 18:21:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-01 18:21:13,077 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:13,111 INFO L225 Difference]: With dead ends: 14596 [2022-03-01 18:21:13,112 INFO L226 Difference]: Without dead ends: 14492 [2022-03-01 18:21:13,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6252 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1633, Invalid=16727, Unknown=0, NotChecked=0, Total=18360 [2022-03-01 18:21:13,112 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 844 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 4964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 966 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:13,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1076 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3827 Invalid, 0 Unknown, 966 Unchecked, 1.8s Time] [2022-03-01 18:21:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14492 states. [2022-03-01 18:21:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14492 to 7858. [2022-03-01 18:21:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.4789359806541937) internal successors, (27334), 7857 states have internal predecessors, (27334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 27334 transitions. [2022-03-01 18:21:13,308 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 27334 transitions. Word has length 30 [2022-03-01 18:21:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:13,309 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 27334 transitions. [2022-03-01 18:21:13,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 27334 transitions. [2022-03-01 18:21:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:13,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:13,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:13,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 18:21:13,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:13,522 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1211295284, now seen corresponding path program 21 times [2022-03-01 18:21:13,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:13,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935629990] [2022-03-01 18:21:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:13,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:13,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935629990] [2022-03-01 18:21:13,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935629990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:13,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409418776] [2022-03-01 18:21:13,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:21:13,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:13,836 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:13,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 18:21:13,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:21:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:13,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:21:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:14,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 18:21:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:14,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:14,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:14,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:14,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:14,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409418776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:14,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:14,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:21:14,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298313216] [2022-03-01 18:21:14,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:14,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:21:14,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:21:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:21:14,927 INFO L87 Difference]: Start difference. First operand 7858 states and 27334 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:23,152 INFO L93 Difference]: Finished difference Result 13827 states and 44982 transitions. [2022-03-01 18:21:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 18:21:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:23,185 INFO L225 Difference]: With dead ends: 13827 [2022-03-01 18:21:23,185 INFO L226 Difference]: Without dead ends: 13797 [2022-03-01 18:21:23,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2214, Invalid=18092, Unknown=0, NotChecked=0, Total=20306 [2022-03-01 18:21:23,187 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 623 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:23,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 948 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 18:21:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-03-01 18:21:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 7859. [2022-03-01 18:21:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-01 18:21:23,413 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-01 18:21:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:23,413 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-01 18:21:23,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-01 18:21:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:23,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:23,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:23,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 18:21:23,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-01 18:21:23,634 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527216, now seen corresponding path program 22 times [2022-03-01 18:21:23,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:23,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269687837] [2022-03-01 18:21:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:23,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:23,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269687837] [2022-03-01 18:21:23,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269687837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:23,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977931900] [2022-03-01 18:21:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:21:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:23,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:23,903 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:23,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 18:21:23,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:21:23,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:21:23,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:24,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:24,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-03-01 18:21:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:24,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:24,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:24,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:24,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:24,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:24,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:24,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977931900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:24,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:24,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 18:21:24,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13355256] [2022-03-01 18:21:24,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:24,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:21:24,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:21:24,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:21:24,902 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:36,236 INFO L93 Difference]: Finished difference Result 14735 states and 47614 transitions. [2022-03-01 18:21:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-01 18:21:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-01 18:21:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:36,273 INFO L225 Difference]: With dead ends: 14735 [2022-03-01 18:21:36,273 INFO L226 Difference]: Without dead ends: 14660 [2022-03-01 18:21:36,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12048 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3411, Invalid=27741, Unknown=0, NotChecked=0, Total=31152 [2022-03-01 18:21:36,274 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 759 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 5762 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 6537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:36,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1546 Invalid, 6537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5762 Invalid, 0 Unknown, 524 Unchecked, 2.7s Time] [2022-03-01 18:21:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2022-03-01 18:21:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 7859. [2022-03-01 18:21:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 7858 states have (on average 3.4790022906592006) internal successors, (27338), 7858 states have internal predecessors, (27338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-01 18:21:36,490 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-01 18:21:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:36,490 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-01 18:21:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-01 18:21:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:36,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:36,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:36,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 18:21:36,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:36,704 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1359410238, now seen corresponding path program 23 times [2022-03-01 18:21:36,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:36,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558235104] [2022-03-01 18:21:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:36,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:36,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558235104] [2022-03-01 18:21:36,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558235104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:36,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264612591] [2022-03-01 18:21:36,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:21:36,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:36,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:36,968 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:36,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 18:21:36,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:21:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:21:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:37,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-03-01 18:21:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:37,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:37,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:37,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:37,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:37,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:38,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264612591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:38,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:38,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 18:21:38,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845570463] [2022-03-01 18:21:38,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:38,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:21:38,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:21:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:38,017 INFO L87 Difference]: Start difference. First operand 7859 states and 27338 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:43,382 INFO L93 Difference]: Finished difference Result 12864 states and 41779 transitions. [2022-03-01 18:21:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:21:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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 30 [2022-03-01 18:21:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:43,413 INFO L225 Difference]: With dead ends: 12864 [2022-03-01 18:21:43,414 INFO L226 Difference]: Without dead ends: 12834 [2022-03-01 18:21:43,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3794 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1478, Invalid=9864, Unknown=0, NotChecked=0, Total=11342 [2022-03-01 18:21:43,415 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:43,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 567 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:21:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-01 18:21:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 7861. [2022-03-01 18:21:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 7860 states have (on average 3.4790076335877864) internal successors, (27345), 7860 states have internal predecessors, (27345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 27345 transitions. [2022-03-01 18:21:43,623 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 27345 transitions. Word has length 30 [2022-03-01 18:21:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:43,623 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 27345 transitions. [2022-03-01 18:21:43,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 27345 transitions. [2022-03-01 18:21:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:43,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:43,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:43,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 18:21:43,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:43,845 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1324381350, now seen corresponding path program 24 times [2022-03-01 18:21:43,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:43,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241547304] [2022-03-01 18:21:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:44,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:44,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241547304] [2022-03-01 18:21:44,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241547304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:44,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755733077] [2022-03-01 18:21:44,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:21:44,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:44,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:44,105 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:44,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 18:21:44,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:21:44,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:21:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:21:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:44,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:44,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-03-01 18:21:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:44,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:44,843 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:21:44,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:44,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:44,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:44,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:45,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755733077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:45,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:45,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 18:21:45,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998751665] [2022-03-01 18:21:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:21:45,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:21:45,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:21:45,167 INFO L87 Difference]: Start difference. First operand 7861 states and 27345 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:21:53,727 INFO L93 Difference]: Finished difference Result 13877 states and 45561 transitions. [2022-03-01 18:21:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-01 18:21:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:21:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:21:53,757 INFO L225 Difference]: With dead ends: 13877 [2022-03-01 18:21:53,757 INFO L226 Difference]: Without dead ends: 13845 [2022-03-01 18:21:53,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1637, Invalid=14113, Unknown=0, NotChecked=0, Total=15750 [2022-03-01 18:21:53,758 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 643 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:21:53,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 982 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3974 Invalid, 0 Unknown, 458 Unchecked, 1.8s Time] [2022-03-01 18:21:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-03-01 18:21:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 7898. [2022-03-01 18:21:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7897 states have (on average 3.4795491958971763) internal successors, (27478), 7897 states have internal predecessors, (27478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 27478 transitions. [2022-03-01 18:21:53,967 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 27478 transitions. Word has length 30 [2022-03-01 18:21:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:21:53,967 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 27478 transitions. [2022-03-01 18:21:53,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:21:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 27478 transitions. [2022-03-01 18:21:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:21:53,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:21:53,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:21:53,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 18:21:54,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:54,180 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:21:54,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:21:54,181 INFO L85 PathProgramCache]: Analyzing trace with hash -511893078, now seen corresponding path program 25 times [2022-03-01 18:21:54,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:21:54,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882046572] [2022-03-01 18:21:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:21:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:21:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:54,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:21:54,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882046572] [2022-03-01 18:21:54,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882046572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:21:54,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130446535] [2022-03-01 18:21:54,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:21:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:21:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:21:54,464 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:21:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 18:21:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:21:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:21:54,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:21:54,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:21:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:54,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:21:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:54,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:21:55,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:55,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:21:55,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:21:55,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:21:55,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:21:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:21:55,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130446535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:21:55,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:21:55,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:21:55,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219307445] [2022-03-01 18:21:55,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:21:55,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:21:55,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:21:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:21:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:21:55,522 INFO L87 Difference]: Start difference. First operand 7898 states and 27478 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:03,350 INFO L93 Difference]: Finished difference Result 13318 states and 43304 transitions. [2022-03-01 18:22:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-01 18:22:03,351 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:03,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:03,381 INFO L225 Difference]: With dead ends: 13318 [2022-03-01 18:22:03,381 INFO L226 Difference]: Without dead ends: 13296 [2022-03-01 18:22:03,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2084, Invalid=14428, Unknown=0, NotChecked=0, Total=16512 [2022-03-01 18:22:03,382 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 791 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:03,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 720 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 18:22:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13296 states. [2022-03-01 18:22:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13296 to 7899. [2022-03-01 18:22:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 7898 states have (on average 3.479615092428463) internal successors, (27482), 7898 states have internal predecessors, (27482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 27482 transitions. [2022-03-01 18:22:03,562 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 27482 transitions. Word has length 30 [2022-03-01 18:22:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:03,563 INFO L470 AbstractCegarLoop]: Abstraction has 7899 states and 27482 transitions. [2022-03-01 18:22:03,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 27482 transitions. [2022-03-01 18:22:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:03,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:03,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:03,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 18:22:03,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-01 18:22:03,775 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 456149418, now seen corresponding path program 26 times [2022-03-01 18:22:03,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:03,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898530178] [2022-03-01 18:22:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:04,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898530178] [2022-03-01 18:22:04,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898530178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:04,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325638165] [2022-03-01 18:22:04,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:22:04,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:04,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:04,118 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:04,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 18:22:04,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:22:04,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 18:22:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:04,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:04,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2022-03-01 18:22:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:04,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:05,019 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:22:05,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:22:05,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:05,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:05,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:05,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:22:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:05,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325638165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:05,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:05,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-01 18:22:05,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237709862] [2022-03-01 18:22:05,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:05,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:22:05,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:22:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:22:05,374 INFO L87 Difference]: Start difference. First operand 7899 states and 27482 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:22,020 INFO L93 Difference]: Finished difference Result 16236 states and 52944 transitions. [2022-03-01 18:22:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-01 18:22:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:22,060 INFO L225 Difference]: With dead ends: 16236 [2022-03-01 18:22:22,060 INFO L226 Difference]: Without dead ends: 16184 [2022-03-01 18:22:22,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18212 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=6022, Invalid=38710, Unknown=0, NotChecked=0, Total=44732 [2022-03-01 18:22:22,062 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1103 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 6773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:22,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 966 Invalid, 6773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 4879 Invalid, 0 Unknown, 1427 Unchecked, 2.6s Time] [2022-03-01 18:22:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-03-01 18:22:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 7938. [2022-03-01 18:22:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7938 states, 7937 states have (on average 3.4833060350258283) internal successors, (27647), 7937 states have internal predecessors, (27647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 27647 transitions. [2022-03-01 18:22:22,268 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 27647 transitions. Word has length 30 [2022-03-01 18:22:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:22,269 INFO L470 AbstractCegarLoop]: Abstraction has 7938 states and 27647 transitions. [2022-03-01 18:22:22,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 27647 transitions. [2022-03-01 18:22:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:22,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:22,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:22,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 18:22:22,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-01 18:22:22,482 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash -801041019, now seen corresponding path program 22 times [2022-03-01 18:22:22,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:22,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770398123] [2022-03-01 18:22:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:22,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:22,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:22,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770398123] [2022-03-01 18:22:22,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770398123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:22,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499905572] [2022-03-01 18:22:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:22:22,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:22,919 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:22,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 18:22:22,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:22:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:22:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:23,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-03-01 18:22:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:23,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:23,607 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:23,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-03-01 18:22:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:23,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:23,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499905572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:23,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:23,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-01 18:22:23,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630499440] [2022-03-01 18:22:23,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:23,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:22:23,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:22:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:22:23,774 INFO L87 Difference]: Start difference. First operand 7938 states and 27647 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:31,583 INFO L93 Difference]: Finished difference Result 16154 states and 53648 transitions. [2022-03-01 18:22:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 18:22:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:31,618 INFO L225 Difference]: With dead ends: 16154 [2022-03-01 18:22:31,619 INFO L226 Difference]: Without dead ends: 16107 [2022-03-01 18:22:31,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2594, Invalid=13918, Unknown=0, NotChecked=0, Total=16512 [2022-03-01 18:22:31,620 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 865 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:31,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 783 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:22:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16107 states. [2022-03-01 18:22:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16107 to 7951. [2022-03-01 18:22:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.4813836477987423) internal successors, (27677), 7950 states have internal predecessors, (27677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 27677 transitions. [2022-03-01 18:22:31,842 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 27677 transitions. Word has length 30 [2022-03-01 18:22:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:31,842 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 27677 transitions. [2022-03-01 18:22:31,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 27677 transitions. [2022-03-01 18:22:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:31,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:31,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:31,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 18:22:32,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 18:22:32,055 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -312520331, now seen corresponding path program 23 times [2022-03-01 18:22:32,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:32,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938877286] [2022-03-01 18:22:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:32,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:32,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938877286] [2022-03-01 18:22:32,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938877286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:32,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089965729] [2022-03-01 18:22:32,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:22:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:32,414 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:32,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 18:22:32,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:22:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:22:32,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:32,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:22:32,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-03-01 18:22:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:32,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:33,116 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:33,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-03-01 18:22:33,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:33,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:33,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089965729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:33,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:33,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-01 18:22:33,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989774720] [2022-03-01 18:22:33,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:33,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:22:33,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:22:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:22:33,261 INFO L87 Difference]: Start difference. First operand 7951 states and 27677 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:22:55,980 INFO L93 Difference]: Finished difference Result 20702 states and 67784 transitions. [2022-03-01 18:22:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-03-01 18:22:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:22:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:22:56,028 INFO L225 Difference]: With dead ends: 20702 [2022-03-01 18:22:56,029 INFO L226 Difference]: Without dead ends: 20654 [2022-03-01 18:22:56,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41453 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=9257, Invalid=85915, Unknown=0, NotChecked=0, Total=95172 [2022-03-01 18:22:56,033 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1124 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 5521 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 5521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:22:56,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1159 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 5521 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:22:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2022-03-01 18:22:56,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 7972. [2022-03-01 18:22:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7972 states, 7971 states have (on average 3.482749968636307) internal successors, (27761), 7971 states have internal predecessors, (27761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 27761 transitions. [2022-03-01 18:22:56,319 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 27761 transitions. Word has length 30 [2022-03-01 18:22:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:22:56,319 INFO L470 AbstractCegarLoop]: Abstraction has 7972 states and 27761 transitions. [2022-03-01 18:22:56,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:22:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 27761 transitions. [2022-03-01 18:22:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:22:56,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:22:56,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:22:56,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 18:22:56,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 18:22:56,532 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:22:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:22:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash -53764609, now seen corresponding path program 24 times [2022-03-01 18:22:56,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:22:56,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38064863] [2022-03-01 18:22:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:22:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:22:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:22:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:56,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:22:56,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38064863] [2022-03-01 18:22:56,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38064863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:22:56,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145388712] [2022-03-01 18:22:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:22:56,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:22:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:22:56,977 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:22:56,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 18:22:57,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:22:57,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:22:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 18:22:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:22:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:57,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:57,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:57,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-01 18:22:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:57,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:22:57,801 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:22:57,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-03-01 18:22:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:22:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:22:57,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-01 18:22:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:22:57,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145388712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:22:57,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:22:57,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-01 18:22:57,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38559250] [2022-03-01 18:22:57,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:22:57,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-01 18:22:57,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:22:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-01 18:22:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 18:22:57,953 INFO L87 Difference]: Start difference. First operand 7972 states and 27761 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:07,006 INFO L93 Difference]: Finished difference Result 16143 states and 53625 transitions. [2022-03-01 18:23:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-01 18:23:07,007 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:07,043 INFO L225 Difference]: With dead ends: 16143 [2022-03-01 18:23:07,043 INFO L226 Difference]: Without dead ends: 16096 [2022-03-01 18:23:07,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9478 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3565, Invalid=20927, Unknown=0, NotChecked=0, Total=24492 [2022-03-01 18:23:07,044 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 899 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 4379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:07,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 887 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 18:23:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2022-03-01 18:23:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 7981. [2022-03-01 18:23:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.4845864661654136) internal successors, (27807), 7980 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 27807 transitions. [2022-03-01 18:23:07,243 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 27807 transitions. Word has length 30 [2022-03-01 18:23:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:07,243 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 27807 transitions. [2022-03-01 18:23:07,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 27807 transitions. [2022-03-01 18:23:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:07,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:07,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:07,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-01 18:23:07,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:07,456 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 740544464, now seen corresponding path program 27 times [2022-03-01 18:23:07,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:07,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165352538] [2022-03-01 18:23:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:07,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:07,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165352538] [2022-03-01 18:23:07,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165352538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:07,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716401047] [2022-03-01 18:23:07,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:23:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:07,768 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:07,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 18:23:07,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:23:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:23:07,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:08,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:08,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 18:23:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:08,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:08,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:08,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-03-01 18:23:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:09,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716401047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:09,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:09,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:23:09,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789742946] [2022-03-01 18:23:09,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:09,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:23:09,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:09,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:23:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:23:09,158 INFO L87 Difference]: Start difference. First operand 7981 states and 27807 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:14,196 INFO L93 Difference]: Finished difference Result 12813 states and 40793 transitions. [2022-03-01 18:23:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-01 18:23:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:14,224 INFO L225 Difference]: With dead ends: 12813 [2022-03-01 18:23:14,224 INFO L226 Difference]: Without dead ends: 12791 [2022-03-01 18:23:14,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1705, Invalid=14297, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 18:23:14,225 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 621 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1245 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:14,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 813 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2495 Invalid, 0 Unknown, 1245 Unchecked, 1.2s Time] [2022-03-01 18:23:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-03-01 18:23:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 7977. [2022-03-01 18:23:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7977 states, 7976 states have (on average 3.484704112337011) internal successors, (27794), 7976 states have internal predecessors, (27794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27794 transitions. [2022-03-01 18:23:14,405 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27794 transitions. Word has length 30 [2022-03-01 18:23:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:14,406 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 27794 transitions. [2022-03-01 18:23:14,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27794 transitions. [2022-03-01 18:23:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:14,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:14,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:14,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 18:23:14,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:14,618 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash 193579860, now seen corresponding path program 28 times [2022-03-01 18:23:14,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:14,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877810761] [2022-03-01 18:23:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:14,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:14,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877810761] [2022-03-01 18:23:14,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877810761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:14,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600361904] [2022-03-01 18:23:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:23:14,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:14,899 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:14,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 18:23:14,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:23:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:14,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:23:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:15,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:23:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:15,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:15,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:23:15,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:15,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:15,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:23:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:16,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600361904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:16,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:16,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-01 18:23:16,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583176143] [2022-03-01 18:23:16,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:16,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:23:16,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:23:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:23:16,038 INFO L87 Difference]: Start difference. First operand 7977 states and 27794 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:23,902 INFO L93 Difference]: Finished difference Result 13886 states and 45259 transitions. [2022-03-01 18:23:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-01 18:23:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:23,928 INFO L225 Difference]: With dead ends: 13886 [2022-03-01 18:23:23,929 INFO L226 Difference]: Without dead ends: 13864 [2022-03-01 18:23:23,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2247, Invalid=18923, Unknown=0, NotChecked=0, Total=21170 [2022-03-01 18:23:23,930 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 588 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:23,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 849 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:23:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2022-03-01 18:23:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 7979. [2022-03-01 18:23:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7979 states, 7978 states have (on average 3.484707946853848) internal successors, (27801), 7978 states have internal predecessors, (27801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27801 transitions. [2022-03-01 18:23:24,140 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27801 transitions. Word has length 30 [2022-03-01 18:23:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27801 transitions. [2022-03-01 18:23:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27801 transitions. [2022-03-01 18:23:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:24,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:24,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:24,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 18:23:24,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:24,352 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1161622356, now seen corresponding path program 29 times [2022-03-01 18:23:24,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:24,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248732037] [2022-03-01 18:23:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:24,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:24,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248732037] [2022-03-01 18:23:24,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248732037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:24,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070462157] [2022-03-01 18:23:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:23:24,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:24,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:24,621 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:24,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 18:23:24,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:23:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:23:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:24,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:24,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2022-03-01 18:23:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:25,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:25,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:23:25,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:25,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:25,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:23:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:25,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070462157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:25,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:25,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 18:23:25,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081222851] [2022-03-01 18:23:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:25,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:23:25,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:23:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:23:25,662 INFO L87 Difference]: Start difference. First operand 7979 states and 27801 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2022-03-01 18:23:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:38,121 INFO L93 Difference]: Finished difference Result 15043 states and 48614 transitions. [2022-03-01 18:23:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-03-01 18:23:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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 30 [2022-03-01 18:23:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:38,154 INFO L225 Difference]: With dead ends: 15043 [2022-03-01 18:23:38,154 INFO L226 Difference]: Without dead ends: 15014 [2022-03-01 18:23:38,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15351 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3955, Invalid=35447, Unknown=0, NotChecked=0, Total=39402 [2022-03-01 18:23:38,157 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 688 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:38,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1211 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 18:23:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15014 states. [2022-03-01 18:23:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15014 to 7976. [2022-03-01 18:23:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7976 states, 7975 states have (on average 3.484388714733542) internal successors, (27788), 7975 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 27788 transitions. [2022-03-01 18:23:38,380 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 27788 transitions. Word has length 30 [2022-03-01 18:23:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:38,380 INFO L470 AbstractCegarLoop]: Abstraction has 7976 states and 27788 transitions. [2022-03-01 18:23:38,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 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) [2022-03-01 18:23:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 27788 transitions. [2022-03-01 18:23:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:38,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:38,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:38,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-01 18:23:38,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:38,596 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1258533564, now seen corresponding path program 30 times [2022-03-01 18:23:38,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:38,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221723097] [2022-03-01 18:23:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:38,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:38,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:38,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221723097] [2022-03-01 18:23:38,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221723097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:38,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695017526] [2022-03-01 18:23:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:23:38,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:38,983 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:38,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 18:23:39,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:23:39,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:23:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:23:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:39,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:39,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-03-01 18:23:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:39,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:40,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:40,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:40,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:40,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:23:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:40,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-01 18:23:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:40,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695017526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:23:40,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:23:40,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-01 18:23:40,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341443444] [2022-03-01 18:23:40,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:23:40,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:23:40,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:23:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:23:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:23:40,452 INFO L87 Difference]: Start difference. First operand 7976 states and 27788 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:58,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:23:58,271 INFO L93 Difference]: Finished difference Result 15939 states and 52512 transitions. [2022-03-01 18:23:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-01 18:23:58,271 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:23:58,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:23:58,304 INFO L225 Difference]: With dead ends: 15939 [2022-03-01 18:23:58,305 INFO L226 Difference]: Without dead ends: 15826 [2022-03-01 18:23:58,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19742 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=5763, Invalid=43743, Unknown=0, NotChecked=0, Total=49506 [2022-03-01 18:23:58,307 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1204 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 7247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2076 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:23:58,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1171 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 4737 Invalid, 0 Unknown, 2076 Unchecked, 2.6s Time] [2022-03-01 18:23:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2022-03-01 18:23:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 8034. [2022-03-01 18:23:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8034 states, 8033 states have (on average 3.487364620938628) internal successors, (28014), 8033 states have internal predecessors, (28014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 28014 transitions. [2022-03-01 18:23:58,506 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 28014 transitions. Word has length 30 [2022-03-01 18:23:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:23:58,506 INFO L470 AbstractCegarLoop]: Abstraction has 8034 states and 28014 transitions. [2022-03-01 18:23:58,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:23:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 28014 transitions. [2022-03-01 18:23:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:23:58,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:23:58,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:23:58,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 18:23:58,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:58,719 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:23:58,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:23:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash -553862034, now seen corresponding path program 31 times [2022-03-01 18:23:58,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:23:58,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722909873] [2022-03-01 18:23:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:23:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:23:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:59,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:23:59,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722909873] [2022-03-01 18:23:59,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722909873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:23:59,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131301017] [2022-03-01 18:23:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:23:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:23:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:23:59,121 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:23:59,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 18:23:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:23:59,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:23:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:23:59,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:23:59,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:23:59,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-03-01 18:23:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:23:59,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:23:59,823 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:23:59,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:23:59,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:23:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:00,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:00,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:24:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:00,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131301017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:00,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:00,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:24:00,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993142927] [2022-03-01 18:24:00,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:00,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:24:00,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:00,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:24:00,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:00,200 INFO L87 Difference]: Start difference. First operand 8034 states and 28014 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:04,432 INFO L93 Difference]: Finished difference Result 14061 states and 46525 transitions. [2022-03-01 18:24:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-01 18:24:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:04,467 INFO L225 Difference]: With dead ends: 14061 [2022-03-01 18:24:04,467 INFO L226 Difference]: Without dead ends: 14020 [2022-03-01 18:24:04,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=810, Invalid=6846, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 18:24:04,468 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 499 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:04,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 777 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 517 Unchecked, 1.5s Time] [2022-03-01 18:24:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14020 states. [2022-03-01 18:24:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14020 to 8023. [2022-03-01 18:24:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8023 states, 8022 states have (on average 3.486661680378958) internal successors, (27970), 8022 states have internal predecessors, (27970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8023 states to 8023 states and 27970 transitions. [2022-03-01 18:24:04,690 INFO L78 Accepts]: Start accepts. Automaton has 8023 states and 27970 transitions. Word has length 30 [2022-03-01 18:24:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:04,690 INFO L470 AbstractCegarLoop]: Abstraction has 8023 states and 27970 transitions. [2022-03-01 18:24:04,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 8023 states and 27970 transitions. [2022-03-01 18:24:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:04,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:04,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:04,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:04,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-01 18:24:04,904 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2072629490, now seen corresponding path program 32 times [2022-03-01 18:24:04,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:04,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274122334] [2022-03-01 18:24:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:05,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:05,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274122334] [2022-03-01 18:24:05,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274122334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:05,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677302244] [2022-03-01 18:24:05,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:05,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:05,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:05,218 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:05,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 18:24:05,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:24:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:05,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:05,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-03-01 18:24:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:05,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:06,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:06,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:24:06,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:06,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-01 18:24:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:06,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677302244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:06,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:06,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-03-01 18:24:06,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075509565] [2022-03-01 18:24:06,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:06,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:24:06,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:06,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:24:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:24:06,444 INFO L87 Difference]: Start difference. First operand 8023 states and 27970 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:22,687 INFO L93 Difference]: Finished difference Result 16255 states and 54161 transitions. [2022-03-01 18:24:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-01 18:24:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:22,728 INFO L225 Difference]: With dead ends: 16255 [2022-03-01 18:24:22,728 INFO L226 Difference]: Without dead ends: 16202 [2022-03-01 18:24:22,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17497 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4968, Invalid=40188, Unknown=0, NotChecked=0, Total=45156 [2022-03-01 18:24:22,731 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1035 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 7514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 4579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2533 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:22,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1056 Invalid, 7514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 4579 Invalid, 0 Unknown, 2533 Unchecked, 2.6s Time] [2022-03-01 18:24:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2022-03-01 18:24:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 8006. [2022-03-01 18:24:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8006 states, 8005 states have (on average 3.484946908182386) internal successors, (27897), 8005 states have internal predecessors, (27897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 27897 transitions. [2022-03-01 18:24:23,003 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 27897 transitions. Word has length 30 [2022-03-01 18:24:23,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:23,003 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 27897 transitions. [2022-03-01 18:24:23,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:23,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 27897 transitions. [2022-03-01 18:24:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:23,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:23,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:23,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 18:24:23,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-01 18:24:23,217 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -638630994, now seen corresponding path program 33 times [2022-03-01 18:24:23,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:23,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682485270] [2022-03-01 18:24:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:23,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:23,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:23,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682485270] [2022-03-01 18:24:23,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682485270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:23,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403404837] [2022-03-01 18:24:23,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:24:23,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:23,520 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:23,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 18:24:23,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:24:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:24:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:23,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:23,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-01 18:24:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:24,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:24,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:24,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-03-01 18:24:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:25,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403404837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:25,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:25,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-01 18:24:25,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050006308] [2022-03-01 18:24:25,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:25,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:24:25,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:24:25,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:25,215 INFO L87 Difference]: Start difference. First operand 8006 states and 27897 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:30,258 INFO L93 Difference]: Finished difference Result 13775 states and 45224 transitions. [2022-03-01 18:24:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:24:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-01 18:24:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:30,290 INFO L225 Difference]: With dead ends: 13775 [2022-03-01 18:24:30,290 INFO L226 Difference]: Without dead ends: 13768 [2022-03-01 18:24:30,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4252 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1425, Invalid=10347, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 18:24:30,291 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:30,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 705 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2859 Invalid, 0 Unknown, 722 Unchecked, 1.4s Time] [2022-03-01 18:24:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13768 states. [2022-03-01 18:24:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13768 to 8005. [2022-03-01 18:24:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8004 states have (on average 3.48488255872064) internal successors, (27893), 8004 states have internal predecessors, (27893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 27893 transitions. [2022-03-01 18:24:30,492 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 27893 transitions. Word has length 30 [2022-03-01 18:24:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:30,492 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 27893 transitions. [2022-03-01 18:24:30,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 27893 transitions. [2022-03-01 18:24:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:30,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:30,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:30,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 18:24:30,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:30,705 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 459794410, now seen corresponding path program 34 times [2022-03-01 18:24:30,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:30,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693864596] [2022-03-01 18:24:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:31,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:31,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693864596] [2022-03-01 18:24:31,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693864596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:31,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184059253] [2022-03-01 18:24:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:24:31,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:31,076 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 18:24:31,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:24:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:24:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:31,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-03-01 18:24:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:31,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:31,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:24:31,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:31,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:31,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:31,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:24:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:32,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184059253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:32,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:32,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-01 18:24:32,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699855418] [2022-03-01 18:24:32,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:32,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:24:32,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:24:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:24:32,112 INFO L87 Difference]: Start difference. First operand 8005 states and 27893 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:37,074 INFO L93 Difference]: Finished difference Result 13077 states and 42731 transitions. [2022-03-01 18:24:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 18:24:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 30 [2022-03-01 18:24:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:37,105 INFO L225 Difference]: With dead ends: 13077 [2022-03-01 18:24:37,105 INFO L226 Difference]: Without dead ends: 13040 [2022-03-01 18:24:37,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1218, Invalid=8288, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:24:37,106 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 449 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:37,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 715 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2836 Invalid, 0 Unknown, 449 Unchecked, 1.3s Time] [2022-03-01 18:24:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13040 states. [2022-03-01 18:24:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13040 to 8004. [2022-03-01 18:24:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8004 states, 8003 states have (on average 3.48494314632013) internal successors, (27890), 8003 states have internal predecessors, (27890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 27890 transitions. [2022-03-01 18:24:37,303 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 27890 transitions. Word has length 30 [2022-03-01 18:24:37,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:37,303 INFO L470 AbstractCegarLoop]: Abstraction has 8004 states and 27890 transitions. [2022-03-01 18:24:37,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 27890 transitions. [2022-03-01 18:24:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:37,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:37,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:37,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 18:24:37,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:37,517 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496730, now seen corresponding path program 35 times [2022-03-01 18:24:37,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:37,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969832230] [2022-03-01 18:24:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:37,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:37,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969832230] [2022-03-01 18:24:37,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969832230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:37,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654119628] [2022-03-01 18:24:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:24:37,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:37,887 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:37,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 18:24:37,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 18:24:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:37,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:24:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:38,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:38,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-03-01 18:24:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:38,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:38,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:38,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:24:38,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:38,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:38,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:38,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:24:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:38,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654119628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:38,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:38,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 18:24:38,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267368506] [2022-03-01 18:24:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:38,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:38,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:38,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:38,976 INFO L87 Difference]: Start difference. First operand 8004 states and 27890 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:43,591 INFO L93 Difference]: Finished difference Result 12790 states and 41775 transitions. [2022-03-01 18:24:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 18:24:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 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 30 [2022-03-01 18:24:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:43,671 INFO L225 Difference]: With dead ends: 12790 [2022-03-01 18:24:43,671 INFO L226 Difference]: Without dead ends: 12783 [2022-03-01 18:24:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1075, Invalid=7115, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:24:43,672 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:43,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 547 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:24:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-03-01 18:24:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 8007. [2022-03-01 18:24:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8007 states, 8006 states have (on average 3.4850112415688232) internal successors, (27901), 8006 states have internal predecessors, (27901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 27901 transitions. [2022-03-01 18:24:43,850 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 27901 transitions. Word has length 30 [2022-03-01 18:24:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:43,850 INFO L470 AbstractCegarLoop]: Abstraction has 8007 states and 27901 transitions. [2022-03-01 18:24:43,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 27901 transitions. [2022-03-01 18:24:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:43,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:43,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:43,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-01 18:24:44,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:44,064 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1285608810, now seen corresponding path program 36 times [2022-03-01 18:24:44,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:44,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473977471] [2022-03-01 18:24:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:44,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:44,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473977471] [2022-03-01 18:24:44,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473977471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:44,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573379587] [2022-03-01 18:24:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:24:44,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:44,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:44,424 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:44,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 18:24:44,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 18:24:44,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 18:24:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:44,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:44,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-01 18:24:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:44,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:45,132 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:24:45,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:24:45,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:45,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:45,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:45,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:24:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:45,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573379587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:45,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:45,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 18:24:45,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839207326] [2022-03-01 18:24:45,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:45,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:45,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:45,457 INFO L87 Difference]: Start difference. First operand 8007 states and 27901 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:51,599 INFO L93 Difference]: Finished difference Result 13667 states and 45204 transitions. [2022-03-01 18:24:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:24:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:51,633 INFO L225 Difference]: With dead ends: 13667 [2022-03-01 18:24:51,633 INFO L226 Difference]: Without dead ends: 13630 [2022-03-01 18:24:51,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=942, Invalid=8564, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 18:24:51,634 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 530 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:51,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 888 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3495 Invalid, 0 Unknown, 372 Unchecked, 1.7s Time] [2022-03-01 18:24:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13630 states. [2022-03-01 18:24:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13630 to 7954. [2022-03-01 18:24:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 3.4853514397082863) internal successors, (27719), 7953 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 27719 transitions. [2022-03-01 18:24:51,847 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 27719 transitions. Word has length 30 [2022-03-01 18:24:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:51,847 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 27719 transitions. [2022-03-01 18:24:51,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 27719 transitions. [2022-03-01 18:24:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:51,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:51,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:51,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 18:24:52,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 18:24:52,061 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash 788969820, now seen corresponding path program 37 times [2022-03-01 18:24:52,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:52,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256721436] [2022-03-01 18:24:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:52,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256721436] [2022-03-01 18:24:52,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256721436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:52,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455903307] [2022-03-01 18:24:52,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:24:52,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:52,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:52,388 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:52,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 18:24:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-01 18:24:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:24:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:24:52,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:52,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-01 18:24:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:52,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:24:53,083 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:24:53,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:24:53,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:24:53,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:24:53,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-03-01 18:24:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:53,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455903307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:24:53,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:24:53,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:24:53,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791187614] [2022-03-01 18:24:53,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:24:53,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:24:53,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:24:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:24:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:24:53,483 INFO L87 Difference]: Start difference. First operand 7954 states and 27719 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:59,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:24:59,024 INFO L93 Difference]: Finished difference Result 13093 states and 42430 transitions. [2022-03-01 18:24:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 18:24:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:24:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:24:59,056 INFO L225 Difference]: With dead ends: 13093 [2022-03-01 18:24:59,057 INFO L226 Difference]: Without dead ends: 13048 [2022-03-01 18:24:59,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1105, Invalid=9607, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 18:24:59,057 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 554 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 3715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:24:59,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 858 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3531 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:24:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2022-03-01 18:24:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 7969. [2022-03-01 18:24:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7969 states, 7968 states have (on average 3.487449799196787) internal successors, (27788), 7968 states have internal predecessors, (27788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 27788 transitions. [2022-03-01 18:24:59,265 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 27788 transitions. Word has length 30 [2022-03-01 18:24:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:24:59,265 INFO L470 AbstractCegarLoop]: Abstraction has 7969 states and 27788 transitions. [2022-03-01 18:24:59,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:24:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 27788 transitions. [2022-03-01 18:24:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:24:59,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:24:59,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:24:59,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 18:24:59,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 18:24:59,479 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:24:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:24:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2049272556, now seen corresponding path program 38 times [2022-03-01 18:24:59,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:24:59,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566448267] [2022-03-01 18:24:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:24:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:24:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:24:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:24:59,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:24:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566448267] [2022-03-01 18:24:59,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566448267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:24:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235080505] [2022-03-01 18:24:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:24:59,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:24:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:24:59,768 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:24:59,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 18:24:59,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:24:59,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:24:59,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 18:24:59,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:25:00,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:00,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-01 18:25:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:00,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:25:00,481 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-01 18:25:00,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-03-01 18:25:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:25:00,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:00,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-01 18:25:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:00,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235080505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:25:00,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:25:00,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:25:00,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675950740] [2022-03-01 18:25:00,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:25:00,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:25:00,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:25:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:25:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:25:00,838 INFO L87 Difference]: Start difference. First operand 7969 states and 27788 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:25:06,861 INFO L93 Difference]: Finished difference Result 14336 states and 46397 transitions. [2022-03-01 18:25:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-01 18:25:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 18:25:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:25:06,900 INFO L225 Difference]: With dead ends: 14336 [2022-03-01 18:25:06,901 INFO L226 Difference]: Without dead ends: 14232 [2022-03-01 18:25:06,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1246, Invalid=11636, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:25:06,902 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 523 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4731 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:25:06,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1359 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4731 Invalid, 0 Unknown, 317 Unchecked, 2.1s Time] [2022-03-01 18:25:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2022-03-01 18:25:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 7968. [2022-03-01 18:25:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7968 states, 7967 states have (on average 3.4853771808710934) internal successors, (27768), 7967 states have internal predecessors, (27768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 27768 transitions. [2022-03-01 18:25:07,140 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 27768 transitions. Word has length 30 [2022-03-01 18:25:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:25:07,140 INFO L470 AbstractCegarLoop]: Abstraction has 7968 states and 27768 transitions. [2022-03-01 18:25:07,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:25:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 27768 transitions. [2022-03-01 18:25:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 18:25:07,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:25:07,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:25:07,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 18:25:07,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 18:25:07,356 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 18:25:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:25:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -368775916, now seen corresponding path program 39 times [2022-03-01 18:25:07,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:25:07,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346114087] [2022-03-01 18:25:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:25:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:25:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:25:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:25:07,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:25:07,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346114087] [2022-03-01 18:25:07,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346114087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:25:07,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549594086] [2022-03-01 18:25:07,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:25:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:25:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:25:07,652 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:25:07,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 18:25:07,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 18:25:07,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:25:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 18:25:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:25:08,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:25:08,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 Received shutdown request... [2022-03-01 18:30:30,267 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-01 18:30:30,269 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 18:30:30,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 18:30:30,299 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:30:30,299 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:30:30,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 18:30:30,469 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. [2022-03-01 18:30:30,471 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 18:30:30,471 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 18:30:30,471 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 18:30:30,474 INFO L732 BasicCegarLoop]: Path program histogram: [39, 29, 24, 6, 3, 2, 1] [2022-03-01 18:30:30,476 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:30:30,476 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:30:30,478 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:30:30 BasicIcfg [2022-03-01 18:30:30,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:30:30,478 INFO L158 Benchmark]: Toolchain (without parser) took 757570.86ms. Allocated memory was 187.7MB in the beginning and 780.1MB in the end (delta: 592.4MB). Free memory was 142.5MB in the beginning and 262.6MB in the end (delta: -120.1MB). Peak memory consumption was 643.8MB. Max. memory is 8.0GB. [2022-03-01 18:30:30,478 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 187.7MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:30:30,478 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.88ms. Allocated memory is still 187.7MB. Free memory was 142.5MB in the beginning and 141.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:30:30,478 INFO L158 Benchmark]: Boogie Preprocessor took 12.45ms. Allocated memory is still 187.7MB. Free memory was 141.0MB in the beginning and 140.0MB in the end (delta: 983.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:30:30,478 INFO L158 Benchmark]: RCFGBuilder took 185.22ms. Allocated memory is still 187.7MB. Free memory was 140.0MB in the beginning and 131.1MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-01 18:30:30,478 INFO L158 Benchmark]: TraceAbstraction took 757334.91ms. Allocated memory was 187.7MB in the beginning and 780.1MB in the end (delta: 592.4MB). Free memory was 130.6MB in the beginning and 262.6MB in the end (delta: -132.0MB). Peak memory consumption was 632.3MB. Max. memory is 8.0GB. [2022-03-01 18:30:30,480 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 0.15ms. Allocated memory is still 187.7MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.88ms. Allocated memory is still 187.7MB. Free memory was 142.5MB in the beginning and 141.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.45ms. Allocated memory is still 187.7MB. Free memory was 141.0MB in the beginning and 140.0MB in the end (delta: 983.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 185.22ms. Allocated memory is still 187.7MB. Free memory was 140.0MB in the beginning and 131.1MB in the end (delta: 8.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 757334.91ms. Allocated memory was 187.7MB in the beginning and 780.1MB in the end (delta: 592.4MB). Free memory was 130.6MB in the beginning and 262.6MB in the end (delta: -132.0MB). Peak memory consumption was 632.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 53]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - TimeoutResultAtElement [Line: 52]: 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 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 757.2s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.8s, AutomataDifference: 333.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48384 SdHoareTripleChecker+Valid, 80.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48384 mSDsluCounter, 41233 SdHoareTripleChecker+Invalid, 68.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14222 IncrementalHoareTripleChecker+Unchecked, 69252 mSDsCounter, 11607 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 161157 IncrementalHoareTripleChecker+Invalid, 186986 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11607 mSolverCounterUnsat, 3408 mSDtfsCounter, 161157 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11742 GetRequests, 4083 SyntacticMatches, 297 SemanticMatches, 7362 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 340143 ImplicationChecksByTransitivity, 263.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8034occurred in iteration=95, InterpolantAutomatonStates: 6675, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.8s AutomataMinimizationTime, 103 MinimizatonAttempts, 388397 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 64.0s InterpolantComputationTime, 5379 NumberOfCodeBlocks, 5376 NumberOfCodeBlocksAsserted, 305 NumberOfCheckSat, 7693 ConstructedInterpolants, 83 QuantifiedInterpolants, 88567 SizeOfPredicates, 943 NumberOfNonLiveVariables, 5860 ConjunctsInSsa, 1342 ConjunctsInUnsatCore, 293 InterpolantComputations, 9 PerfectInterpolantSequences, 320/1579 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