/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 [2022-03-03 19:48:54,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:48:54,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:48:54,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:48:54,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:48:54,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:48:54,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:48:54,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:48:54,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:48:54,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:48:54,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:48:54,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:48:54,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:48:54,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:48:54,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:48:54,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:48:54,801 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:48:54,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:48:54,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:48:54,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:48:54,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:48:54,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:48:54,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:48:54,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:48:54,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:48:54,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:48:54,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:48:54,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:48:55,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:48:55,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:48:55,016 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:48:55,019 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:48:55,019 INFO L432 ainManager$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 [2022-03-03 19:48:55,020 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' [2022-03-03 19:48:55,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:48:55,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:48:55,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:48:55,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:48:55,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:48:55,049 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,054 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,058 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:48:55,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:48:55,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:48:55,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:48:55,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:48:55,065 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,065 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,065 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,066 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,067 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,070 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,070 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 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:48:55,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:48:55,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:48:55,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:48:55,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:48:55" (1/1) ... [2022-03-03 19:48:55,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:48:55,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:55,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:48:55,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:48:55,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:48:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:48:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:48:55,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:48:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:48:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:48:55,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:48:55,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:48:55,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:48:55,133 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:48:55,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:48:55,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:48:55,133 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:48:55,166 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:48:55,167 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:48:55,228 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:48:55,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:48:55,233 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:48:55,234 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:48:55 BoogieIcfgContainer [2022-03-03 19:48:55,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:48:55,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:48:55,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:48:55,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:48:55,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:48:55" (1/2) ... [2022-03-03 19:48:55,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9d6bfc and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:48:55, skipping insertion in model container [2022-03-03 19:48:55,238 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 03.03 07:48:55" (2/2) ... [2022-03-03 19:48:55,239 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2022-03-03 19:48:55,242 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:48:55,242 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:48:55,242 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:48:55,242 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:48:55,272 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:48:55,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:48:55,302 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:48:55,302 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:48:55,323 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-03 19:48:55,369 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:48:55,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:55,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:55,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash 855514725, now seen corresponding path program 1 times [2022-03-03 19:48:55,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:55,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954146925] [2022-03-03 19:48:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:55,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:55,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954146925] [2022-03-03 19:48:55,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954146925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:55,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:55,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:48:55,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147655784] [2022-03-03 19:48:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:55,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:48:55,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:48:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:48:55,570 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:55,630 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-03 19:48:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:48:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:48:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:55,640 INFO L225 Difference]: With dead ends: 298 [2022-03-03 19:48:55,640 INFO L226 Difference]: Without dead ends: 283 [2022-03-03 19:48:55,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:48:55,653 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:55,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:48:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-03 19:48:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-03 19:48:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-03 19:48:55,718 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-03 19:48:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:55,719 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-03 19:48:55,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-03 19:48:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:55,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:55,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:55,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:48:55,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash -116344776, now seen corresponding path program 1 times [2022-03-03 19:48:55,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:55,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060395264] [2022-03-03 19:48:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:55,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:55,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:55,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060395264] [2022-03-03 19:48:55,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060395264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:55,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171552671] [2022-03-03 19:48:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:55,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:55,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:48:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:55,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:48:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:56,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:56,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171552671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:56,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:56,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-03 19:48:56,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614189913] [2022-03-03 19:48:56,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:56,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:48:56,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:56,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:48:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:48:56,187 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) [2022-03-03 19:48:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:56,658 INFO L93 Difference]: Finished difference Result 1259 states and 3629 transitions. [2022-03-03 19:48:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:48:56,659 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 [2022-03-03 19:48:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:56,666 INFO L225 Difference]: With dead ends: 1259 [2022-03-03 19:48:56,667 INFO L226 Difference]: Without dead ends: 1259 [2022-03-03 19:48:56,668 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 [2022-03-03 19:48:56,671 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:56,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:48:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-03 19:48:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 253. [2022-03-03 19:48:56,707 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) [2022-03-03 19:48:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2022-03-03 19:48:56,712 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2022-03-03 19:48:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:56,712 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2022-03-03 19:48:56,713 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) [2022-03-03 19:48:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2022-03-03 19:48:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:56,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:56,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:56,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:56,931 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 [2022-03-03 19:48:56,931 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash -310245444, now seen corresponding path program 2 times [2022-03-03 19:48:56,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:56,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391058909] [2022-03-03 19:48:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:56,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:56,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391058909] [2022-03-03 19:48:56,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391058909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:56,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133896306] [2022-03-03 19:48:56,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:48:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:56,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:56,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:48:57,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:57,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:48:57,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:57,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133896306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:57,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:57,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-03 19:48:57,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599339762] [2022-03-03 19:48:57,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:57,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:48:57,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:48:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:48:57,181 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) [2022-03-03 19:48:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:57,525 INFO L93 Difference]: Finished difference Result 1133 states and 3241 transitions. [2022-03-03 19:48:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:48:57,526 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 [2022-03-03 19:48:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:57,530 INFO L225 Difference]: With dead ends: 1133 [2022-03-03 19:48:57,530 INFO L226 Difference]: Without dead ends: 1133 [2022-03-03 19:48:57,531 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 [2022-03-03 19:48:57,531 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:48:57,532 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] [2022-03-03 19:48:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-03 19:48:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 252. [2022-03-03 19:48:57,540 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) [2022-03-03 19:48:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2022-03-03 19:48:57,541 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2022-03-03 19:48:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2022-03-03 19:48:57,541 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) [2022-03-03 19:48:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2022-03-03 19:48:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:57,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:57,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:57,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:57,751 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 [2022-03-03 19:48:57,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:57,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1009084743, now seen corresponding path program 1 times [2022-03-03 19:48:57,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:57,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130995135] [2022-03-03 19:48:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:57,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:57,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:57,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130995135] [2022-03-03 19:48:57,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130995135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:57,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:57,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:48:57,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344657221] [2022-03-03 19:48:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:57,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:48:57,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:48:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:48:57,803 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) [2022-03-03 19:48:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:57,862 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2022-03-03 19:48:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:48:57,862 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 [2022-03-03 19:48:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:57,864 INFO L225 Difference]: With dead ends: 483 [2022-03-03 19:48:57,864 INFO L226 Difference]: Without dead ends: 477 [2022-03-03 19:48:57,864 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 [2022-03-03 19:48:57,865 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:57,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 28 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:48:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-03 19:48:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2022-03-03 19:48:57,871 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) [2022-03-03 19:48:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-03-03 19:48:57,872 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2022-03-03 19:48:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:57,873 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-03-03 19:48:57,873 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) [2022-03-03 19:48:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-03-03 19:48:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:57,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:57,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:57,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:48:57,874 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1724408590, now seen corresponding path program 1 times [2022-03-03 19:48:57,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:57,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057722023] [2022-03-03 19:48:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:57,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:57,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057722023] [2022-03-03 19:48:57,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057722023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:57,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:57,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:48:57,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667624185] [2022-03-03 19:48:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:57,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:48:57,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:48:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:48:57,924 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) [2022-03-03 19:48:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:58,015 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2022-03-03 19:48:58,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:48:58,015 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 [2022-03-03 19:48:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:58,017 INFO L225 Difference]: With dead ends: 539 [2022-03-03 19:48:58,017 INFO L226 Difference]: Without dead ends: 521 [2022-03-03 19:48:58,017 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 [2022-03-03 19:48:58,018 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:48:58,018 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] [2022-03-03 19:48:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-03 19:48:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2022-03-03 19:48:58,026 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) [2022-03-03 19:48:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2022-03-03 19:48:58,028 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2022-03-03 19:48:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:58,028 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2022-03-03 19:48:58,028 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) [2022-03-03 19:48:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2022-03-03 19:48:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:58,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:58,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:58,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:48:58,030 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1927279607, now seen corresponding path program 2 times [2022-03-03 19:48:58,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:58,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998113718] [2022-03-03 19:48:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:58,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998113718] [2022-03-03 19:48:58,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998113718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:58,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:58,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:48:58,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516928257] [2022-03-03 19:48:58,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:58,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:48:58,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:48:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:48:58,061 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) [2022-03-03 19:48:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:58,106 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2022-03-03 19:48:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:48:58,106 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 [2022-03-03 19:48:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:58,108 INFO L225 Difference]: With dead ends: 486 [2022-03-03 19:48:58,108 INFO L226 Difference]: Without dead ends: 486 [2022-03-03 19:48:58,108 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 [2022-03-03 19:48:58,109 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 [2022-03-03 19:48:58,109 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] [2022-03-03 19:48:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-03-03 19:48:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2022-03-03 19:48:58,115 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) [2022-03-03 19:48:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2022-03-03 19:48:58,122 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2022-03-03 19:48:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:58,122 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2022-03-03 19:48:58,123 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) [2022-03-03 19:48:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2022-03-03 19:48:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:58,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:58,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:58,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:48:58,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1202883661, now seen corresponding path program 3 times [2022-03-03 19:48:58,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:58,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910372370] [2022-03-03 19:48:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:58,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910372370] [2022-03-03 19:48:58,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910372370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:58,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:58,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 19:48:58,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136365854] [2022-03-03 19:48:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:58,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:48:58,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:48:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:48:58,157 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) [2022-03-03 19:48:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:58,219 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2022-03-03 19:48:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:48:58,219 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 [2022-03-03 19:48:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:58,221 INFO L225 Difference]: With dead ends: 438 [2022-03-03 19:48:58,221 INFO L226 Difference]: Without dead ends: 438 [2022-03-03 19:48:58,221 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 [2022-03-03 19:48:58,222 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:58,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:48:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-03 19:48:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2022-03-03 19:48:58,228 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) [2022-03-03 19:48:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-03 19:48:58,229 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-03 19:48:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:58,229 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-03 19:48:58,229 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) [2022-03-03 19:48:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-03 19:48:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:58,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:58,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:48:58,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700470, now seen corresponding path program 3 times [2022-03-03 19:48:58,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:58,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673751489] [2022-03-03 19:48:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:58,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673751489] [2022-03-03 19:48:58,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673751489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:58,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406480245] [2022-03-03 19:48:58,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:48:58,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:58,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:58,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:48:58,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:48:58,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:48:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406480245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:58,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:58,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 19:48:58,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584376095] [2022-03-03 19:48:58,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:58,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:48:58,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:48:58,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:48:58,394 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) [2022-03-03 19:48:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:58,688 INFO L93 Difference]: Finished difference Result 1154 states and 3249 transitions. [2022-03-03 19:48:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:48:58,689 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 [2022-03-03 19:48:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:58,693 INFO L225 Difference]: With dead ends: 1154 [2022-03-03 19:48:58,693 INFO L226 Difference]: Without dead ends: 1154 [2022-03-03 19:48:58,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:48:58,694 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:48:58,694 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] [2022-03-03 19:48:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-03 19:48:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 323. [2022-03-03 19:48:58,704 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) [2022-03-03 19:48:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-03-03 19:48:58,705 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-03-03 19:48:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:58,705 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-03-03 19:48:58,705 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) [2022-03-03 19:48:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-03-03 19:48:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:58,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:58,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:58,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:58,918 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 [2022-03-03 19:48:58,919 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash -731586770, now seen corresponding path program 2 times [2022-03-03 19:48:58,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:58,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310653318] [2022-03-03 19:48:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:58,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:58,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:58,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310653318] [2022-03-03 19:48:58,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310653318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:58,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:58,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 19:48:58,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507054860] [2022-03-03 19:48:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:58,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:48:58,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:48:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:48:58,973 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) [2022-03-03 19:48:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,091 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2022-03-03 19:48:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:48:59,091 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 [2022-03-03 19:48:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,093 INFO L225 Difference]: With dead ends: 466 [2022-03-03 19:48:59,093 INFO L226 Difference]: Without dead ends: 466 [2022-03-03 19:48:59,093 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 [2022-03-03 19:48:59,094 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 [2022-03-03 19:48:59,094 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] [2022-03-03 19:48:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-03 19:48:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2022-03-03 19:48:59,099 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) [2022-03-03 19:48:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2022-03-03 19:48:59,100 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2022-03-03 19:48:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,100 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2022-03-03 19:48:59,100 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) [2022-03-03 19:48:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2022-03-03 19:48:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:59,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-03 19:48:59,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1391482172, now seen corresponding path program 4 times [2022-03-03 19:48:59,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285048603] [2022-03-03 19:48:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285048603] [2022-03-03 19:48:59,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285048603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:59,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:59,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 19:48:59,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803736555] [2022-03-03 19:48:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:59,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:48:59,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:59,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:48:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:48:59,129 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) [2022-03-03 19:48:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,224 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2022-03-03 19:48:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:48:59,224 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 [2022-03-03 19:48:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,226 INFO L225 Difference]: With dead ends: 541 [2022-03-03 19:48:59,226 INFO L226 Difference]: Without dead ends: 537 [2022-03-03 19:48:59,226 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 [2022-03-03 19:48:59,227 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 [2022-03-03 19:48:59,227 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] [2022-03-03 19:48:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-03 19:48:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2022-03-03 19:48:59,233 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) [2022-03-03 19:48:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2022-03-03 19:48:59,233 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2022-03-03 19:48:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2022-03-03 19:48:59,234 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) [2022-03-03 19:48:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2022-03-03 19:48:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:59,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-03 19:48:59,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1513963908, now seen corresponding path program 5 times [2022-03-03 19:48:59,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479010243] [2022-03-03 19:48:59,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479010243] [2022-03-03 19:48:59,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479010243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028529781] [2022-03-03 19:48:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:48:59,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:59,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:48:59,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:48:59,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028529781] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:59,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:48:59,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2022-03-03 19:48:59,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538158816] [2022-03-03 19:48:59,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:59,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:48:59,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:48:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:48:59,441 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) [2022-03-03 19:48:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,564 INFO L93 Difference]: Finished difference Result 653 states and 1834 transitions. [2022-03-03 19:48:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:48:59,565 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 [2022-03-03 19:48:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,568 INFO L225 Difference]: With dead ends: 653 [2022-03-03 19:48:59,568 INFO L226 Difference]: Without dead ends: 653 [2022-03-03 19:48:59,568 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 [2022-03-03 19:48:59,569 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 [2022-03-03 19:48:59,569 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] [2022-03-03 19:48:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-03 19:48:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 278. [2022-03-03 19:48:59,588 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) [2022-03-03 19:48:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2022-03-03 19:48:59,589 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2022-03-03 19:48:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2022-03-03 19:48:59,589 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) [2022-03-03 19:48:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2022-03-03 19:48:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:48:59,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:59,806 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 [2022-03-03 19:48:59,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash 268685562, now seen corresponding path program 6 times [2022-03-03 19:48:59,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100024674] [2022-03-03 19:48:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100024674] [2022-03-03 19:48:59,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100024674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:48:59,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:48:59,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-03 19:48:59,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938221015] [2022-03-03 19:48:59,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:48:59,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:48:59,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:48:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:48:59,836 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) [2022-03-03 19:48:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,900 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-03-03 19:48:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:48:59,900 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 [2022-03-03 19:48:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,902 INFO L225 Difference]: With dead ends: 429 [2022-03-03 19:48:59,902 INFO L226 Difference]: Without dead ends: 425 [2022-03-03 19:48:59,902 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 [2022-03-03 19:48:59,902 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:59,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:48:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-03 19:48:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2022-03-03 19:48:59,907 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) [2022-03-03 19:48:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2022-03-03 19:48:59,908 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2022-03-03 19:48:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,908 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2022-03-03 19:48:59,908 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) [2022-03-03 19:48:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2022-03-03 19:48:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:48:59,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-03 19:48:59,909 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1300936698, now seen corresponding path program 1 times [2022-03-03 19:48:59,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854585793] [2022-03-03 19:48:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854585793] [2022-03-03 19:48:59,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854585793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:59,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417124850] [2022-03-03 19:48:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:59,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:59,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:48:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:48:59,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:00,097 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 [2022-03-03 19:49:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:00,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:00,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:00,219 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 [2022-03-03 19:49:00,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:00,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417124850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:00,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:00,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-03 19:49:00,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779993058] [2022-03-03 19:49:00,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:49:00,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:00,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:49:00,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:49:00,263 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) [2022-03-03 19:49:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:00,339 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2022-03-03 19:49:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:49:00,339 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 [2022-03-03 19:49:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:00,341 INFO L225 Difference]: With dead ends: 552 [2022-03-03 19:49:00,341 INFO L226 Difference]: Without dead ends: 537 [2022-03-03 19:49:00,341 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 [2022-03-03 19:49:00,342 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-03 19:49:00,342 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] [2022-03-03 19:49:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-03-03 19:49:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2022-03-03 19:49:00,348 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) [2022-03-03 19:49:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2022-03-03 19:49:00,349 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2022-03-03 19:49:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:00,350 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2022-03-03 19:49:00,350 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) [2022-03-03 19:49:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2022-03-03 19:49:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:00,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:00,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:00,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:00,569 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 [2022-03-03 19:49:00,569 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1432556635, now seen corresponding path program 1 times [2022-03-03 19:49:00,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:00,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759380884] [2022-03-03 19:49:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:00,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:00,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:00,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759380884] [2022-03-03 19:49:00,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759380884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:00,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563348864] [2022-03-03 19:49:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:00,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:00,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:49:00,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,971 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 [2022-03-03 19:49:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:00,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:01,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:01,109 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 19:49:01,120 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 [2022-03-03 19:49:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:01,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563348864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:01,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:01,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-03 19:49:01,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693513224] [2022-03-03 19:49:01,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:01,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:49:01,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:49:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:49:01,180 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) [2022-03-03 19:49:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:02,071 INFO L93 Difference]: Finished difference Result 850 states and 2460 transitions. [2022-03-03 19:49:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:49:02,071 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 [2022-03-03 19:49:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:02,074 INFO L225 Difference]: With dead ends: 850 [2022-03-03 19:49:02,074 INFO L226 Difference]: Without dead ends: 835 [2022-03-03 19:49:02,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:49:02,075 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:02,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-03 19:49:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 438. [2022-03-03 19:49:02,083 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) [2022-03-03 19:49:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2022-03-03 19:49:02,084 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2022-03-03 19:49:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:02,085 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2022-03-03 19:49:02,085 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) [2022-03-03 19:49:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2022-03-03 19:49:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:02,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:02,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:02,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:02,302 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 [2022-03-03 19:49:02,302 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1637705597, now seen corresponding path program 2 times [2022-03-03 19:49:02,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:02,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936024207] [2022-03-03 19:49:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:02,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:02,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936024207] [2022-03-03 19:49:02,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936024207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:02,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68741934] [2022-03-03 19:49:02,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:02,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:02,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:02,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:02,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:49:02,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:02,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:02,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:02,702 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 [2022-03-03 19:49:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:02,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:02,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:02,904 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 [2022-03-03 19:49:02,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:02,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68741934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:02,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:02,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-03-03 19:49:02,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780152416] [2022-03-03 19:49:02,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:02,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:49:02,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:49:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:49:02,978 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) [2022-03-03 19:49:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:04,182 INFO L93 Difference]: Finished difference Result 1170 states and 3382 transitions. [2022-03-03 19:49:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:49:04,182 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 [2022-03-03 19:49:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:04,186 INFO L225 Difference]: With dead ends: 1170 [2022-03-03 19:49:04,186 INFO L226 Difference]: Without dead ends: 1155 [2022-03-03 19:49:04,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:49:04,187 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 270 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:04,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 222 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:49:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-03-03 19:49:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 439. [2022-03-03 19:49:04,204 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) [2022-03-03 19:49:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2022-03-03 19:49:04,206 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2022-03-03 19:49:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:04,206 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2022-03-03 19:49:04,206 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) [2022-03-03 19:49:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2022-03-03 19:49:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:04,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:04,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:04,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:04,423 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 [2022-03-03 19:49:04,424 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 142032238, now seen corresponding path program 2 times [2022-03-03 19:49:04,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:04,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52671837] [2022-03-03 19:49:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:04,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:04,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52671837] [2022-03-03 19:49:04,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52671837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:04,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814379053] [2022-03-03 19:49:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:04,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:04,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:49:04,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:04,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:04,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:49:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:04,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:49:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:04,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:04,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:04,720 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 [2022-03-03 19:49:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:04,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814379053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:04,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:04,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:49:04,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179204665] [2022-03-03 19:49:04,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:04,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:49:04,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:49:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:49:04,778 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) [2022-03-03 19:49:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:04,863 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2022-03-03 19:49:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:49:04,863 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 [2022-03-03 19:49:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:04,866 INFO L225 Difference]: With dead ends: 645 [2022-03-03 19:49:04,866 INFO L226 Difference]: Without dead ends: 630 [2022-03-03 19:49:04,866 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 [2022-03-03 19:49:04,868 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 [2022-03-03 19:49:04,868 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] [2022-03-03 19:49:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-03 19:49:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2022-03-03 19:49:04,876 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) [2022-03-03 19:49:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2022-03-03 19:49:04,877 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2022-03-03 19:49:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:04,877 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2022-03-03 19:49:04,877 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) [2022-03-03 19:49:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2022-03-03 19:49:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:04,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:04,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:04,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:05,086 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 [2022-03-03 19:49:05,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1337506361, now seen corresponding path program 3 times [2022-03-03 19:49:05,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:05,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941839677] [2022-03-03 19:49:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:05,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:05,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:05,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941839677] [2022-03-03 19:49:05,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941839677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:05,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182706465] [2022-03-03 19:49:05,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:05,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:05,271 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:05,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:49:05,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:49:05,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:05,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:05,506 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 [2022-03-03 19:49:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:05,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:05,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:05,636 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 [2022-03-03 19:49:05,647 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 [2022-03-03 19:49:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:05,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182706465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:05,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:05,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-03-03 19:49:05,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390315678] [2022-03-03 19:49:05,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:05,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:49:05,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:49:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:49:05,740 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) [2022-03-03 19:49:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:06,043 INFO L93 Difference]: Finished difference Result 679 states and 1940 transitions. [2022-03-03 19:49:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:49:06,043 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 [2022-03-03 19:49:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:06,046 INFO L225 Difference]: With dead ends: 679 [2022-03-03 19:49:06,046 INFO L226 Difference]: Without dead ends: 664 [2022-03-03 19:49:06,046 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 [2022-03-03 19:49:06,046 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 [2022-03-03 19:49:06,047 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] [2022-03-03 19:49:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-03 19:49:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 465. [2022-03-03 19:49:06,055 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) [2022-03-03 19:49:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2022-03-03 19:49:06,056 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2022-03-03 19:49:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:06,056 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2022-03-03 19:49:06,056 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) [2022-03-03 19:49:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2022-03-03 19:49:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:06,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:06,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:06,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:06,263 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 [2022-03-03 19:49:06,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash 857029177, now seen corresponding path program 4 times [2022-03-03 19:49:06,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:06,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421432066] [2022-03-03 19:49:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:06,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:06,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421432066] [2022-03-03 19:49:06,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421432066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:06,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243189444] [2022-03-03 19:49:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:06,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:06,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:06,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:06,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:06,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:49:06,586 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 [2022-03-03 19:49:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:06,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:06,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:06,688 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 [2022-03-03 19:49:06,700 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 [2022-03-03 19:49:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:06,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243189444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:06,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:06,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 19:49:06,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616889603] [2022-03-03 19:49:06,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:06,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:06,801 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) [2022-03-03 19:49:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:07,184 INFO L93 Difference]: Finished difference Result 794 states and 2321 transitions. [2022-03-03 19:49:07,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:49:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:49:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:07,187 INFO L225 Difference]: With dead ends: 794 [2022-03-03 19:49:07,187 INFO L226 Difference]: Without dead ends: 779 [2022-03-03 19:49:07,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:49:07,188 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 [2022-03-03 19:49:07,188 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] [2022-03-03 19:49:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-03 19:49:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 469. [2022-03-03 19:49:07,196 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) [2022-03-03 19:49:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2022-03-03 19:49:07,197 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2022-03-03 19:49:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:07,197 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2022-03-03 19:49:07,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2022-03-03 19:49:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:07,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:07,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:07,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:07,414 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 [2022-03-03 19:49:07,414 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1638934791, now seen corresponding path program 5 times [2022-03-03 19:49:07,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:07,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528369576] [2022-03-03 19:49:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:07,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:07,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528369576] [2022-03-03 19:49:07,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528369576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:07,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586453893] [2022-03-03 19:49:07,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:07,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:07,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:07,602 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:07,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:07,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:49:07,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:07,756 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 [2022-03-03 19:49:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:07,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:07,940 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 [2022-03-03 19:49:07,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:08,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586453893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:08,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:08,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-03 19:49:08,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104427576] [2022-03-03 19:49:08,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:08,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:49:08,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:49:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:49:08,077 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) [2022-03-03 19:49:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:08,489 INFO L93 Difference]: Finished difference Result 1008 states and 2935 transitions. [2022-03-03 19:49:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:49:08,490 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 [2022-03-03 19:49:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:08,493 INFO L225 Difference]: With dead ends: 1008 [2022-03-03 19:49:08,493 INFO L226 Difference]: Without dead ends: 978 [2022-03-03 19:49:08,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:08,494 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 [2022-03-03 19:49:08,494 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] [2022-03-03 19:49:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-03-03 19:49:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 471. [2022-03-03 19:49:08,503 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) [2022-03-03 19:49:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1390 transitions. [2022-03-03 19:49:08,504 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1390 transitions. Word has length 24 [2022-03-03 19:49:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:08,504 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1390 transitions. [2022-03-03 19:49:08,504 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) [2022-03-03 19:49:08,504 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1390 transitions. [2022-03-03 19:49:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:08,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:08,505 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] [2022-03-03 19:49:08,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:08,720 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 [2022-03-03 19:49:08,720 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash -931811517, now seen corresponding path program 6 times [2022-03-03 19:49:08,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:08,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333032813] [2022-03-03 19:49:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:08,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:08,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333032813] [2022-03-03 19:49:08,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333032813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:08,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324437954] [2022-03-03 19:49:08,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:08,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:08,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:49:08,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:49:08,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:09,089 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:49:09,089 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 [2022-03-03 19:49:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:09,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:09,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:09,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:09,237 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 [2022-03-03 19:49:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:09,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324437954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:09,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:09,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-03 19:49:09,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343038032] [2022-03-03 19:49:09,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:09,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:49:09,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:49:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:49:09,319 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) [2022-03-03 19:49:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:10,258 INFO L93 Difference]: Finished difference Result 935 states and 2730 transitions. [2022-03-03 19:49:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:49:10,258 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 [2022-03-03 19:49:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:10,262 INFO L225 Difference]: With dead ends: 935 [2022-03-03 19:49:10,262 INFO L226 Difference]: Without dead ends: 920 [2022-03-03 19:49:10,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:49:10,263 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:10,263 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] [2022-03-03 19:49:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-03 19:49:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 487. [2022-03-03 19:49:10,272 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) [2022-03-03 19:49:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1448 transitions. [2022-03-03 19:49:10,273 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1448 transitions. Word has length 24 [2022-03-03 19:49:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1448 transitions. [2022-03-03 19:49:10,273 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) [2022-03-03 19:49:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1448 transitions. [2022-03-03 19:49:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:10,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:10,274 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:10,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:10,490 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 [2022-03-03 19:49:10,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1768350663, now seen corresponding path program 7 times [2022-03-03 19:49:10,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:10,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165338204] [2022-03-03 19:49:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:10,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:10,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165338204] [2022-03-03 19:49:10,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165338204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:10,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913822862] [2022-03-03 19:49:10,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:10,638 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:49:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:10,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:10,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:10,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:49:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:10,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:10,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:10,871 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 [2022-03-03 19:49:10,879 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 [2022-03-03 19:49:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:10,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913822862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:10,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:10,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-03 19:49:10,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001315930] [2022-03-03 19:49:10,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:10,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:49:10,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:49:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:49:10,959 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) [2022-03-03 19:49:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:11,279 INFO L93 Difference]: Finished difference Result 1068 states and 3118 transitions. [2022-03-03 19:49:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:49:11,279 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 [2022-03-03 19:49:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:11,283 INFO L225 Difference]: With dead ends: 1068 [2022-03-03 19:49:11,283 INFO L226 Difference]: Without dead ends: 1038 [2022-03-03 19:49:11,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:11,284 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:11,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 187 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-03 19:49:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-03-03 19:49:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 483. [2022-03-03 19:49:11,292 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) [2022-03-03 19:49:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1434 transitions. [2022-03-03 19:49:11,293 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1434 transitions. Word has length 24 [2022-03-03 19:49:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:11,293 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1434 transitions. [2022-03-03 19:49:11,294 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) [2022-03-03 19:49:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1434 transitions. [2022-03-03 19:49:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:11,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:11,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:11,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:11,526 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 [2022-03-03 19:49:11,527 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:11,527 INFO L85 PathProgramCache]: Analyzing trace with hash 906932625, now seen corresponding path program 8 times [2022-03-03 19:49:11,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:11,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447829802] [2022-03-03 19:49:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:11,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:11,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447829802] [2022-03-03 19:49:11,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447829802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:11,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945802641] [2022-03-03 19:49:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:11,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:11,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:11,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:49:11,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:11,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:11,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:49:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:11,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:12,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:12,077 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 [2022-03-03 19:49:12,087 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 [2022-03-03 19:49:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:12,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945802641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:12,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:12,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-03 19:49:12,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319398480] [2022-03-03 19:49:12,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:12,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:49:12,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:49:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:49:12,176 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) [2022-03-03 19:49:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:13,634 INFO L93 Difference]: Finished difference Result 1208 states and 3557 transitions. [2022-03-03 19:49:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:49:13,635 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 [2022-03-03 19:49:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:13,639 INFO L225 Difference]: With dead ends: 1208 [2022-03-03 19:49:13,639 INFO L226 Difference]: Without dead ends: 1193 [2022-03-03 19:49:13,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:49:13,640 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 231 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-03 19:49:13,640 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] [2022-03-03 19:49:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-03 19:49:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 473. [2022-03-03 19:49:13,650 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) [2022-03-03 19:49:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1394 transitions. [2022-03-03 19:49:13,651 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1394 transitions. Word has length 24 [2022-03-03 19:49:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:13,651 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1394 transitions. [2022-03-03 19:49:13,651 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) [2022-03-03 19:49:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1394 transitions. [2022-03-03 19:49:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:49:13,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:13,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:13,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:13,868 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 [2022-03-03 19:49:13,869 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:13,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:13,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1310802373, now seen corresponding path program 9 times [2022-03-03 19:49:13,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:13,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888027102] [2022-03-03 19:49:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:13,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:13,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:13,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888027102] [2022-03-03 19:49:13,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888027102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:13,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406883129] [2022-03-03 19:49:13,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:13,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:13,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:13,968 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:13,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:49:13,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:49:13,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:49:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:14,106 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:49:14,106 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 [2022-03-03 19:49:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:14,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:14,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:14,194 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 [2022-03-03 19:49:14,204 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 [2022-03-03 19:49:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:14,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406883129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:14,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:14,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-03-03 19:49:14,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301410701] [2022-03-03 19:49:14,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:14,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:49:14,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:49:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:49:14,262 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) [2022-03-03 19:49:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:14,837 INFO L93 Difference]: Finished difference Result 904 states and 2639 transitions. [2022-03-03 19:49:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:49:14,837 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 [2022-03-03 19:49:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:14,843 INFO L225 Difference]: With dead ends: 904 [2022-03-03 19:49:14,843 INFO L226 Difference]: Without dead ends: 889 [2022-03-03 19:49:14,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:49:14,844 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:49:14,844 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] [2022-03-03 19:49:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-03 19:49:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 471. [2022-03-03 19:49:14,863 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) [2022-03-03 19:49:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2022-03-03 19:49:14,864 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2022-03-03 19:49:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:14,864 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2022-03-03 19:49:14,874 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) [2022-03-03 19:49:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2022-03-03 19:49:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:14,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:14,875 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] [2022-03-03 19:49:14,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:15,091 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 [2022-03-03 19:49:15,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065829, now seen corresponding path program 3 times [2022-03-03 19:49:15,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:15,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322630510] [2022-03-03 19:49:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:15,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:15,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322630510] [2022-03-03 19:49:15,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322630510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:15,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926781119] [2022-03-03 19:49:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:15,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:15,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:15,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:49:15,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:49:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:15,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:15,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926781119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:15,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:15,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:49:15,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662132093] [2022-03-03 19:49:15,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:15,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:49:15,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:49:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:49:15,365 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) [2022-03-03 19:49:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:16,508 INFO L93 Difference]: Finished difference Result 3570 states and 10088 transitions. [2022-03-03 19:49:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:49:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:16,527 INFO L225 Difference]: With dead ends: 3570 [2022-03-03 19:49:16,527 INFO L226 Difference]: Without dead ends: 3570 [2022-03-03 19:49:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1738, Invalid=6272, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:49:16,529 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 590 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:16,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 330 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:49:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-03-03 19:49:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 658. [2022-03-03 19:49:16,553 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) [2022-03-03 19:49:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2151 transitions. [2022-03-03 19:49:16,554 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2151 transitions. Word has length 27 [2022-03-03 19:49:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:16,554 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2151 transitions. [2022-03-03 19:49:16,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2151 transitions. [2022-03-03 19:49:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:16,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:16,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:16,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:16,772 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 [2022-03-03 19:49:16,772 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1967000799, now seen corresponding path program 4 times [2022-03-03 19:49:16,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:16,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3076726] [2022-03-03 19:49:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:16,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:16,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3076726] [2022-03-03 19:49:16,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3076726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:16,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882224845] [2022-03-03 19:49:16,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:16,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:16,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:16,811 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:16,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:49:16,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:16,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:17,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882224845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:17,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:17,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:49:17,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109402915] [2022-03-03 19:49:17,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:17,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:49:17,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:49:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:49:17,055 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) [2022-03-03 19:49:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:19,014 INFO L93 Difference]: Finished difference Result 3557 states and 10114 transitions. [2022-03-03 19:49:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:49:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:19,021 INFO L225 Difference]: With dead ends: 3557 [2022-03-03 19:49:19,021 INFO L226 Difference]: Without dead ends: 3557 [2022-03-03 19:49:19,024 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 [2022-03-03 19:49:19,025 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 639 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:19,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 439 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:49:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-03-03 19:49:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 642. [2022-03-03 19:49:19,075 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) [2022-03-03 19:49:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2080 transitions. [2022-03-03 19:49:19,076 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2080 transitions. Word has length 27 [2022-03-03 19:49:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:19,077 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2080 transitions. [2022-03-03 19:49:19,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2080 transitions. [2022-03-03 19:49:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:19,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:19,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:19,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:19,294 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 [2022-03-03 19:49:19,294 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1712302181, now seen corresponding path program 5 times [2022-03-03 19:49:19,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:19,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320602273] [2022-03-03 19:49:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:19,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:19,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320602273] [2022-03-03 19:49:19,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320602273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:19,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792798806] [2022-03-03 19:49:19,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:19,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:19,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:19,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:19,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:49:19,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:49:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:19,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:19,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792798806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:19,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:19,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:49:19,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098853087] [2022-03-03 19:49:19,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:49:19,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:49:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:49:19,561 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) [2022-03-03 19:49:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:20,336 INFO L93 Difference]: Finished difference Result 2695 states and 7631 transitions. [2022-03-03 19:49:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:49:20,337 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 [2022-03-03 19:49:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:20,342 INFO L225 Difference]: With dead ends: 2695 [2022-03-03 19:49:20,342 INFO L226 Difference]: Without dead ends: 2695 [2022-03-03 19:49:20,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1021, Invalid=3671, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:49:20,343 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:20,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 280 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-03-03 19:49:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 650. [2022-03-03 19:49:20,361 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) [2022-03-03 19:49:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2099 transitions. [2022-03-03 19:49:20,363 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2099 transitions. Word has length 27 [2022-03-03 19:49:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:20,363 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2099 transitions. [2022-03-03 19:49:20,363 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) [2022-03-03 19:49:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2099 transitions. [2022-03-03 19:49:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:20,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:20,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:20,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:49:20,580 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 [2022-03-03 19:49:20,580 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 599427504, now seen corresponding path program 10 times [2022-03-03 19:49:20,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:20,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186190623] [2022-03-03 19:49:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:20,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:20,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186190623] [2022-03-03 19:49:20,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186190623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:20,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002086850] [2022-03-03 19:49:20,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:20,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:20,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:20,620 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:20,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:49:20,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:20,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:20,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002086850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:20,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:20,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:49:20,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126400062] [2022-03-03 19:49:20,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:20,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:49:20,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:20,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:49:20,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:49:20,838 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) [2022-03-03 19:49:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:21,628 INFO L93 Difference]: Finished difference Result 2700 states and 7794 transitions. [2022-03-03 19:49:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:49:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:21,653 INFO L225 Difference]: With dead ends: 2700 [2022-03-03 19:49:21,654 INFO L226 Difference]: Without dead ends: 2700 [2022-03-03 19:49:21,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:49:21,655 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 [2022-03-03 19:49:21,655 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] [2022-03-03 19:49:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-03-03 19:49:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 669. [2022-03-03 19:49:21,674 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) [2022-03-03 19:49:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2153 transitions. [2022-03-03 19:49:21,675 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2153 transitions. Word has length 27 [2022-03-03 19:49:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:21,675 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2153 transitions. [2022-03-03 19:49:21,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2153 transitions. [2022-03-03 19:49:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:21,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:21,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:21,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:21,914 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 [2022-03-03 19:49:21,914 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1019160408, now seen corresponding path program 6 times [2022-03-03 19:49:21,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:21,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193552105] [2022-03-03 19:49:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:21,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:21,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193552105] [2022-03-03 19:49:21,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193552105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:21,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565112247] [2022-03-03 19:49:21,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:21,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:21,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:21,951 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:21,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:49:21,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:49:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:22,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:22,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565112247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:22,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:22,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 19:49:22,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411918933] [2022-03-03 19:49:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:49:22,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:49:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:49:22,098 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) [2022-03-03 19:49:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:22,232 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2022-03-03 19:49:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:49:22,233 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 [2022-03-03 19:49:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:22,235 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 19:49:22,235 INFO L226 Difference]: Without dead ends: 1450 [2022-03-03 19:49:22,236 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 [2022-03-03 19:49:22,236 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 [2022-03-03 19:49:22,236 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] [2022-03-03 19:49:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-03-03 19:49:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1011. [2022-03-03 19:49:22,251 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) [2022-03-03 19:49:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3324 transitions. [2022-03-03 19:49:22,254 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3324 transitions. Word has length 27 [2022-03-03 19:49:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:22,254 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3324 transitions. [2022-03-03 19:49:22,254 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) [2022-03-03 19:49:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3324 transitions. [2022-03-03 19:49:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:22,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:22,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:22,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:22,471 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 [2022-03-03 19:49:22,471 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1294087731, now seen corresponding path program 1 times [2022-03-03 19:49:22,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:22,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699123975] [2022-03-03 19:49:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:22,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:22,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699123975] [2022-03-03 19:49:22,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699123975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:22,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64562599] [2022-03-03 19:49:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:22,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:22,503 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:22,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:49:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:22,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64562599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:22,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:22,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:49:22,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153206164] [2022-03-03 19:49:22,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:22,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:22,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:22,697 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) [2022-03-03 19:49:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:23,094 INFO L93 Difference]: Finished difference Result 2336 states and 6930 transitions. [2022-03-03 19:49:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:49:23,095 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 [2022-03-03 19:49:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:23,099 INFO L225 Difference]: With dead ends: 2336 [2022-03-03 19:49:23,099 INFO L226 Difference]: Without dead ends: 2310 [2022-03-03 19:49:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:49:23,104 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:23,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:49:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-03-03 19:49:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1264. [2022-03-03 19:49:23,127 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) [2022-03-03 19:49:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4200 transitions. [2022-03-03 19:49:23,129 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4200 transitions. Word has length 27 [2022-03-03 19:49:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:23,130 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4200 transitions. [2022-03-03 19:49:23,130 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) [2022-03-03 19:49:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4200 transitions. [2022-03-03 19:49:23,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:23,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:23,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:23,348 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 [2022-03-03 19:49:23,348 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -374136488, now seen corresponding path program 11 times [2022-03-03 19:49:23,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:23,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274149678] [2022-03-03 19:49:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:23,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:23,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274149678] [2022-03-03 19:49:23,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274149678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:23,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077770146] [2022-03-03 19:49:23,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:23,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:23,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:23,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:23,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:49:23,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:49:23,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:23,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:23,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:23,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:23,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077770146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:23,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:23,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:49:23,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147949379] [2022-03-03 19:49:23,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:23,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:49:23,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:49:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:49:23,489 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) [2022-03-03 19:49:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:23,701 INFO L93 Difference]: Finished difference Result 3138 states and 9728 transitions. [2022-03-03 19:49:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:49:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:23,721 INFO L225 Difference]: With dead ends: 3138 [2022-03-03 19:49:23,721 INFO L226 Difference]: Without dead ends: 3099 [2022-03-03 19:49:23,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:49:23,725 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:23,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 212 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:49:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-03-03 19:49:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1754. [2022-03-03 19:49:23,798 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) [2022-03-03 19:49:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5974 transitions. [2022-03-03 19:49:23,802 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5974 transitions. Word has length 27 [2022-03-03 19:49:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:23,802 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5974 transitions. [2022-03-03 19:49:23,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5974 transitions. [2022-03-03 19:49:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:23,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:23,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:23,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-03 19:49:24,020 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 [2022-03-03 19:49:24,020 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1217309363, now seen corresponding path program 2 times [2022-03-03 19:49:24,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:24,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699862122] [2022-03-03 19:49:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:24,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699862122] [2022-03-03 19:49:24,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699862122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:24,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047051398] [2022-03-03 19:49:24,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:24,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:24,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:24,050 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:24,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:49:24,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:24,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047051398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:24,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:24,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:49:24,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407734357] [2022-03-03 19:49:24,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:24,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:24,175 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) [2022-03-03 19:49:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:24,475 INFO L93 Difference]: Finished difference Result 2934 states and 9093 transitions. [2022-03-03 19:49:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:49:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:24,480 INFO L225 Difference]: With dead ends: 2934 [2022-03-03 19:49:24,480 INFO L226 Difference]: Without dead ends: 2912 [2022-03-03 19:49:24,481 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 [2022-03-03 19:49:24,483 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:49:24,484 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] [2022-03-03 19:49:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-03-03 19:49:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1747. [2022-03-03 19:49:24,537 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) [2022-03-03 19:49:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5960 transitions. [2022-03-03 19:49:24,541 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5960 transitions. Word has length 27 [2022-03-03 19:49:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:24,541 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5960 transitions. [2022-03-03 19:49:24,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5960 transitions. [2022-03-03 19:49:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:24,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:24,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:24,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:24,760 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 [2022-03-03 19:49:24,760 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2125115793, now seen corresponding path program 3 times [2022-03-03 19:49:24,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:24,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888133718] [2022-03-03 19:49:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:24,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888133718] [2022-03-03 19:49:24,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888133718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:24,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169689521] [2022-03-03 19:49:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:24,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:24,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:49:24,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:49:24,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:24,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:24,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169689521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:24,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:24,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-03 19:49:24,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921006763] [2022-03-03 19:49:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:49:24,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:49:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:49:24,995 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) [2022-03-03 19:49:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:25,414 INFO L93 Difference]: Finished difference Result 4585 states and 13921 transitions. [2022-03-03 19:49:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:49:25,421 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 [2022-03-03 19:49:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:25,428 INFO L225 Difference]: With dead ends: 4585 [2022-03-03 19:49:25,428 INFO L226 Difference]: Without dead ends: 4559 [2022-03-03 19:49:25,429 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 [2022-03-03 19:49:25,429 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 [2022-03-03 19:49:25,429 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] [2022-03-03 19:49:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2022-03-03 19:49:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1846. [2022-03-03 19:49:25,484 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) [2022-03-03 19:49:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6394 transitions. [2022-03-03 19:49:25,488 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6394 transitions. Word has length 27 [2022-03-03 19:49:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6394 transitions. [2022-03-03 19:49:25,489 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) [2022-03-03 19:49:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6394 transitions. [2022-03-03 19:49:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:25,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:25,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:25,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:25,707 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 [2022-03-03 19:49:25,707 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:25,708 INFO L85 PathProgramCache]: Analyzing trace with hash -665957700, now seen corresponding path program 7 times [2022-03-03 19:49:25,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:25,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860899075] [2022-03-03 19:49:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:25,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:25,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860899075] [2022-03-03 19:49:25,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860899075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007431783] [2022-03-03 19:49:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:25,737 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:25,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:49:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:25,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:25,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007431783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:25,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:25,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-03 19:49:25,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427598295] [2022-03-03 19:49:25,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:25,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:49:25,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:49:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:49:25,871 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) [2022-03-03 19:49:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:26,145 INFO L93 Difference]: Finished difference Result 3417 states and 10465 transitions. [2022-03-03 19:49:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:49:26,145 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 [2022-03-03 19:49:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:26,151 INFO L225 Difference]: With dead ends: 3417 [2022-03-03 19:49:26,151 INFO L226 Difference]: Without dead ends: 3417 [2022-03-03 19:49:26,151 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 [2022-03-03 19:49:26,155 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 [2022-03-03 19:49:26,155 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] [2022-03-03 19:49:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-03-03 19:49:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1858. [2022-03-03 19:49:26,203 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) [2022-03-03 19:49:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6393 transitions. [2022-03-03 19:49:26,208 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6393 transitions. Word has length 27 [2022-03-03 19:49:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:26,208 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6393 transitions. [2022-03-03 19:49:26,208 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) [2022-03-03 19:49:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6393 transitions. [2022-03-03 19:49:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:26,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:26,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:26,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:26,445 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 [2022-03-03 19:49:26,445 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1012536837, now seen corresponding path program 8 times [2022-03-03 19:49:26,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:26,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424512088] [2022-03-03 19:49:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:26,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:26,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:26,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:26,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424512088] [2022-03-03 19:49:26,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424512088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:26,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599150202] [2022-03-03 19:49:26,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:26,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:26,489 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:26,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:26,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:49:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:26,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:26,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599150202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:26,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:26,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 19:49:26,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177076604] [2022-03-03 19:49:26,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:26,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:26,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:26,696 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) [2022-03-03 19:49:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:27,482 INFO L93 Difference]: Finished difference Result 7165 states and 21721 transitions. [2022-03-03 19:49:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:49:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:27,495 INFO L225 Difference]: With dead ends: 7165 [2022-03-03 19:49:27,495 INFO L226 Difference]: Without dead ends: 7165 [2022-03-03 19:49:27,500 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 [2022-03-03 19:49:27,500 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 [2022-03-03 19:49:27,500 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] [2022-03-03 19:49:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-03-03 19:49:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2005. [2022-03-03 19:49:27,594 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) [2022-03-03 19:49:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6987 transitions. [2022-03-03 19:49:27,598 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6987 transitions. Word has length 27 [2022-03-03 19:49:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:27,598 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 6987 transitions. [2022-03-03 19:49:27,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6987 transitions. [2022-03-03 19:49:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:27,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:27,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:27,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:27,817 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 [2022-03-03 19:49:27,817 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash 970143219, now seen corresponding path program 4 times [2022-03-03 19:49:27,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:27,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131751002] [2022-03-03 19:49:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:27,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:27,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:27,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131751002] [2022-03-03 19:49:27,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131751002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:27,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35742626] [2022-03-03 19:49:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:27,853 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:49:27,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:27,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:28,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35742626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:28,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:28,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-03 19:49:28,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994403248] [2022-03-03 19:49:28,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:28,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:49:28,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:49:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:49:28,017 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) [2022-03-03 19:49:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:28,457 INFO L93 Difference]: Finished difference Result 4592 states and 14316 transitions. [2022-03-03 19:49:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:49:28,457 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 [2022-03-03 19:49:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:28,465 INFO L225 Difference]: With dead ends: 4592 [2022-03-03 19:49:28,465 INFO L226 Difference]: Without dead ends: 4592 [2022-03-03 19:49:28,466 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 [2022-03-03 19:49:28,466 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 [2022-03-03 19:49:28,466 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] [2022-03-03 19:49:28,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-03-03 19:49:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2181. [2022-03-03 19:49:28,525 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) [2022-03-03 19:49:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7635 transitions. [2022-03-03 19:49:28,529 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7635 transitions. Word has length 27 [2022-03-03 19:49:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:28,529 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7635 transitions. [2022-03-03 19:49:28,529 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) [2022-03-03 19:49:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7635 transitions. [2022-03-03 19:49:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:28,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:28,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:28,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:28,751 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 [2022-03-03 19:49:28,751 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1201755135, now seen corresponding path program 9 times [2022-03-03 19:49:28,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:28,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191034606] [2022-03-03 19:49:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:28,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:28,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191034606] [2022-03-03 19:49:28,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191034606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:28,788 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524302376] [2022-03-03 19:49:28,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:28,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:28,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:28,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:28,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:49:28,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:49:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:28,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:28,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:28,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524302376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:28,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:28,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 19:49:28,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898064499] [2022-03-03 19:49:28,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:28,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:28,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:28,943 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) [2022-03-03 19:49:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:29,620 INFO L93 Difference]: Finished difference Result 7070 states and 21694 transitions. [2022-03-03 19:49:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:49:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:29,633 INFO L225 Difference]: With dead ends: 7070 [2022-03-03 19:49:29,634 INFO L226 Difference]: Without dead ends: 7062 [2022-03-03 19:49:29,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:49:29,635 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:29,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 191 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2022-03-03 19:49:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 2191. [2022-03-03 19:49:29,698 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) [2022-03-03 19:49:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7646 transitions. [2022-03-03 19:49:29,702 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7646 transitions. Word has length 27 [2022-03-03 19:49:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:29,703 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7646 transitions. [2022-03-03 19:49:29,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7646 transitions. [2022-03-03 19:49:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:29,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:29,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:29,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:29,919 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 [2022-03-03 19:49:29,919 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:29,920 INFO L85 PathProgramCache]: Analyzing trace with hash 187766081, now seen corresponding path program 10 times [2022-03-03 19:49:29,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:29,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494758314] [2022-03-03 19:49:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:29,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:29,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494758314] [2022-03-03 19:49:29,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494758314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:29,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326865849] [2022-03-03 19:49:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:29,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:29,966 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:29,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:49:29,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:29,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:30,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:30,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326865849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:30,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:30,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:30,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728132342] [2022-03-03 19:49:30,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:30,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:30,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:30,152 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) [2022-03-03 19:49:31,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:31,240 INFO L93 Difference]: Finished difference Result 7232 states and 21469 transitions. [2022-03-03 19:49:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:49:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:31,253 INFO L225 Difference]: With dead ends: 7232 [2022-03-03 19:49:31,253 INFO L226 Difference]: Without dead ends: 7232 [2022-03-03 19:49:31,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:49:31,255 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:31,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 303 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:49:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-03-03 19:49:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 2309. [2022-03-03 19:49:31,334 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) [2022-03-03 19:49:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8009 transitions. [2022-03-03 19:49:31,339 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8009 transitions. Word has length 27 [2022-03-03 19:49:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:31,339 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8009 transitions. [2022-03-03 19:49:31,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8009 transitions. [2022-03-03 19:49:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:31,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:31,343 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:31,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:31,558 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 [2022-03-03 19:49:31,558 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1970415551, now seen corresponding path program 11 times [2022-03-03 19:49:31,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:31,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784165841] [2022-03-03 19:49:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:31,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:31,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:31,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784165841] [2022-03-03 19:49:31,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784165841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:31,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299419379] [2022-03-03 19:49:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:31,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:31,609 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:31,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:49:31,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:49:31,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:31,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:31,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299419379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:31,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:31,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:31,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696008479] [2022-03-03 19:49:31,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:31,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:31,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:31,801 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) [2022-03-03 19:49:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:33,104 INFO L93 Difference]: Finished difference Result 7083 states and 21556 transitions. [2022-03-03 19:49:33,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 19:49:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:33,134 INFO L225 Difference]: With dead ends: 7083 [2022-03-03 19:49:33,134 INFO L226 Difference]: Without dead ends: 7075 [2022-03-03 19:49:33,134 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 [2022-03-03 19:49:33,134 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 589 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 293 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:49:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-03-03 19:49:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 2309. [2022-03-03 19:49:33,191 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) [2022-03-03 19:49:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8005 transitions. [2022-03-03 19:49:33,196 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8005 transitions. Word has length 27 [2022-03-03 19:49:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:33,196 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8005 transitions. [2022-03-03 19:49:33,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8005 transitions. [2022-03-03 19:49:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:33,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:33,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:33,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:49:33,414 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 [2022-03-03 19:49:33,414 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1109408773, now seen corresponding path program 12 times [2022-03-03 19:49:33,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:33,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176094416] [2022-03-03 19:49:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:33,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:33,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176094416] [2022-03-03 19:49:33,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176094416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:33,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002853369] [2022-03-03 19:49:33,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:33,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:33,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:33,451 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:33,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:49:33,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:49:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:33,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002853369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:33,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:33,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:49:33,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091081347] [2022-03-03 19:49:33,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:49:33,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:49:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:49:33,637 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) [2022-03-03 19:49:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:34,564 INFO L93 Difference]: Finished difference Result 6206 states and 18904 transitions. [2022-03-03 19:49:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:49:34,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:34,574 INFO L225 Difference]: With dead ends: 6206 [2022-03-03 19:49:34,574 INFO L226 Difference]: Without dead ends: 6206 [2022-03-03 19:49:34,574 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 [2022-03-03 19:49:34,575 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 422 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-03 19:49:34,575 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] [2022-03-03 19:49:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6206 states. [2022-03-03 19:49:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6206 to 2335. [2022-03-03 19:49:34,621 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) [2022-03-03 19:49:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 8092 transitions. [2022-03-03 19:49:34,626 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 8092 transitions. Word has length 27 [2022-03-03 19:49:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:34,626 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 8092 transitions. [2022-03-03 19:49:34,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 8092 transitions. [2022-03-03 19:49:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:34,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:34,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:34,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 19:49:34,845 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 [2022-03-03 19:49:34,845 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:34,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2007542286, now seen corresponding path program 12 times [2022-03-03 19:49:34,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:34,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237946300] [2022-03-03 19:49:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:34,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237946300] [2022-03-03 19:49:34,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237946300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450469981] [2022-03-03 19:49:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:34,878 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:34,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:49:34,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:49:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:34,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:35,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450469981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:35,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:35,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:35,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182224197] [2022-03-03 19:49:35,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:35,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:35,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:35,010 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) [2022-03-03 19:49:35,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:35,550 INFO L93 Difference]: Finished difference Result 6462 states and 20430 transitions. [2022-03-03 19:49:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:49:35,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:35,561 INFO L225 Difference]: With dead ends: 6462 [2022-03-03 19:49:35,561 INFO L226 Difference]: Without dead ends: 6462 [2022-03-03 19:49:35,561 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 [2022-03-03 19:49:35,562 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:35,562 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] [2022-03-03 19:49:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-03-03 19:49:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 2361. [2022-03-03 19:49:35,654 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) [2022-03-03 19:49:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8179 transitions. [2022-03-03 19:49:35,660 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8179 transitions. Word has length 27 [2022-03-03 19:49:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8179 transitions. [2022-03-03 19:49:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8179 transitions. [2022-03-03 19:49:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:35,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:35,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:35,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:49:35,879 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 [2022-03-03 19:49:35,879 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2095266658, now seen corresponding path program 13 times [2022-03-03 19:49:35,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:35,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135811986] [2022-03-03 19:49:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:35,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:35,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135811986] [2022-03-03 19:49:35,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135811986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:35,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238655027] [2022-03-03 19:49:35,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:35,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:35,917 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:35,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:49:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:36,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:36,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238655027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:36,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:36,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:36,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689391967] [2022-03-03 19:49:36,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:36,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:36,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:36,107 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) [2022-03-03 19:49:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:36,735 INFO L93 Difference]: Finished difference Result 6568 states and 20814 transitions. [2022-03-03 19:49:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:49:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:36,746 INFO L225 Difference]: With dead ends: 6568 [2022-03-03 19:49:36,746 INFO L226 Difference]: Without dead ends: 6568 [2022-03-03 19:49:36,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:49:36,747 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:36,747 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] [2022-03-03 19:49:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-03-03 19:49:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 2497. [2022-03-03 19:49:36,806 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) [2022-03-03 19:49:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 8599 transitions. [2022-03-03 19:49:36,810 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 8599 transitions. Word has length 27 [2022-03-03 19:49:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:36,811 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 8599 transitions. [2022-03-03 19:49:36,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 8599 transitions. [2022-03-03 19:49:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:36,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:36,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:36,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:37,020 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 [2022-03-03 19:49:37,020 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1473299244, now seen corresponding path program 14 times [2022-03-03 19:49:37,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:37,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947770185] [2022-03-03 19:49:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:37,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:37,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947770185] [2022-03-03 19:49:37,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947770185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:37,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313477421] [2022-03-03 19:49:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:37,075 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:49:37,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:37,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:37,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:37,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313477421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:37,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:37,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:49:37,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072719893] [2022-03-03 19:49:37,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:37,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:37,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:37,251 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) [2022-03-03 19:49:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:37,540 INFO L93 Difference]: Finished difference Result 5147 states and 16513 transitions. [2022-03-03 19:49:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:49:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:37,549 INFO L225 Difference]: With dead ends: 5147 [2022-03-03 19:49:37,549 INFO L226 Difference]: Without dead ends: 5147 [2022-03-03 19:49:37,549 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 [2022-03-03 19:49:37,549 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:37,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 183 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:49:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-03-03 19:49:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2941. [2022-03-03 19:49:37,597 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) [2022-03-03 19:49:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 10182 transitions. [2022-03-03 19:49:37,603 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 10182 transitions. Word has length 27 [2022-03-03 19:49:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:37,603 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 10182 transitions. [2022-03-03 19:49:37,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 10182 transitions. [2022-03-03 19:49:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:37,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:37,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:37,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:37,822 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 [2022-03-03 19:49:37,822 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 649769698, now seen corresponding path program 15 times [2022-03-03 19:49:37,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:37,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506650637] [2022-03-03 19:49:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:37,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:37,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:37,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506650637] [2022-03-03 19:49:37,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506650637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:37,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888876361] [2022-03-03 19:49:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:37,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:37,859 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:37,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:49:37,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:49:37,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:37,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:37,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:38,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888876361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:38,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:38,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:38,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9010590] [2022-03-03 19:49:38,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:38,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:38,019 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) [2022-03-03 19:49:38,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:38,527 INFO L93 Difference]: Finished difference Result 7126 states and 23054 transitions. [2022-03-03 19:49:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:49:38,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:38,541 INFO L225 Difference]: With dead ends: 7126 [2022-03-03 19:49:38,541 INFO L226 Difference]: Without dead ends: 7122 [2022-03-03 19:49:38,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:49:38,542 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:38,542 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] [2022-03-03 19:49:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-03 19:49:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 2923. [2022-03-03 19:49:38,607 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) [2022-03-03 19:49:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 10111 transitions. [2022-03-03 19:49:38,613 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 10111 transitions. Word has length 27 [2022-03-03 19:49:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:38,613 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 10111 transitions. [2022-03-03 19:49:38,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 10111 transitions. [2022-03-03 19:49:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:38,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:38,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:38,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:49:38,833 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 [2022-03-03 19:49:38,834 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1999520671, now seen corresponding path program 5 times [2022-03-03 19:49:38,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:38,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545777153] [2022-03-03 19:49:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:38,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:38,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545777153] [2022-03-03 19:49:38,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545777153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:38,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207628780] [2022-03-03 19:49:38,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:38,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:38,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:38,863 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:38,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:49:38,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:38,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:39,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207628780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:39,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:39,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:49:39,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681171082] [2022-03-03 19:49:39,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:39,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:39,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:39,037 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) [2022-03-03 19:49:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:39,462 INFO L93 Difference]: Finished difference Result 4977 states and 15922 transitions. [2022-03-03 19:49:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:49:39,462 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 [2022-03-03 19:49:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:39,470 INFO L225 Difference]: With dead ends: 4977 [2022-03-03 19:49:39,470 INFO L226 Difference]: Without dead ends: 4962 [2022-03-03 19:49:39,471 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 [2022-03-03 19:49:39,472 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:39,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 117 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:49:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-03-03 19:49:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3080. [2022-03-03 19:49:39,523 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) [2022-03-03 19:49:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 10792 transitions. [2022-03-03 19:49:39,530 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 10792 transitions. Word has length 27 [2022-03-03 19:49:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 10792 transitions. [2022-03-03 19:49:39,530 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) [2022-03-03 19:49:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 10792 transitions. [2022-03-03 19:49:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:39,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:39,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:39,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:39,750 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 [2022-03-03 19:49:39,750 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1750676451, now seen corresponding path program 6 times [2022-03-03 19:49:39,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:39,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020599120] [2022-03-03 19:49:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:39,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:39,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020599120] [2022-03-03 19:49:39,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020599120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:39,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205856328] [2022-03-03 19:49:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:39,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:39,789 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:39,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:49:39,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:49:39,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:39,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:39,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205856328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:39,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:39,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:49:39,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724007097] [2022-03-03 19:49:39,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:39,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:39,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:39,932 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) [2022-03-03 19:49:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:40,318 INFO L93 Difference]: Finished difference Result 5951 states and 18520 transitions. [2022-03-03 19:49:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:49:40,319 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 [2022-03-03 19:49:40,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:40,329 INFO L225 Difference]: With dead ends: 5951 [2022-03-03 19:49:40,329 INFO L226 Difference]: Without dead ends: 5951 [2022-03-03 19:49:40,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:49:40,331 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:40,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 139 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:49:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-03-03 19:49:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2989. [2022-03-03 19:49:40,400 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) [2022-03-03 19:49:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 10382 transitions. [2022-03-03 19:49:40,406 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 10382 transitions. Word has length 27 [2022-03-03 19:49:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 2989 states and 10382 transitions. [2022-03-03 19:49:40,406 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) [2022-03-03 19:49:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 10382 transitions. [2022-03-03 19:49:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:40,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:40,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:40,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:40,625 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 [2022-03-03 19:49:40,626 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1579991646, now seen corresponding path program 16 times [2022-03-03 19:49:40,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:40,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85356874] [2022-03-03 19:49:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:40,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:40,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85356874] [2022-03-03 19:49:40,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85356874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:40,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267524952] [2022-03-03 19:49:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:40,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:40,674 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:49:40,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:40,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:40,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:40,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267524952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:40,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:40,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:49:40,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601212858] [2022-03-03 19:49:40,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:40,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:40,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:40,901 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) [2022-03-03 19:49:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:42,111 INFO L93 Difference]: Finished difference Result 11830 states and 37070 transitions. [2022-03-03 19:49:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:49:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:42,155 INFO L225 Difference]: With dead ends: 11830 [2022-03-03 19:49:42,155 INFO L226 Difference]: Without dead ends: 11830 [2022-03-03 19:49:42,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1772, Invalid=6418, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:49:42,156 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 706 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:42,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 311 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:49:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2022-03-03 19:49:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 3006. [2022-03-03 19:49:42,252 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) [2022-03-03 19:49:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 10474 transitions. [2022-03-03 19:49:42,257 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 10474 transitions. Word has length 27 [2022-03-03 19:49:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:42,258 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 10474 transitions. [2022-03-03 19:49:42,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:42,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 10474 transitions. [2022-03-03 19:49:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:42,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:42,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:42,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:49:42,470 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 [2022-03-03 19:49:42,470 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1773892314, now seen corresponding path program 17 times [2022-03-03 19:49:42,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:42,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466610029] [2022-03-03 19:49:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:42,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:42,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466610029] [2022-03-03 19:49:42,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466610029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:42,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480362393] [2022-03-03 19:49:42,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:42,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:42,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:42,503 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:42,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:49:42,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:49:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:42,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:42,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:42,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480362393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:42,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:42,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 19:49:42,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738236571] [2022-03-03 19:49:42,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:42,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:42,695 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) [2022-03-03 19:49:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:43,398 INFO L93 Difference]: Finished difference Result 9772 states and 30478 transitions. [2022-03-03 19:49:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 19:49:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:43,416 INFO L225 Difference]: With dead ends: 9772 [2022-03-03 19:49:43,417 INFO L226 Difference]: Without dead ends: 9772 [2022-03-03 19:49:43,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1283, Invalid=3829, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:49:43,427 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 609 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:43,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 289 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2022-03-03 19:49:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 2975. [2022-03-03 19:49:43,534 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) [2022-03-03 19:49:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10324 transitions. [2022-03-03 19:49:43,540 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10324 transitions. Word has length 27 [2022-03-03 19:49:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:43,540 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 10324 transitions. [2022-03-03 19:49:43,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10324 transitions. [2022-03-03 19:49:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:43,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:43,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:43,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:43,753 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 [2022-03-03 19:49:43,753 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:43,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash -225266257, now seen corresponding path program 7 times [2022-03-03 19:49:43,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:43,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049882971] [2022-03-03 19:49:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:43,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:43,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:43,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049882971] [2022-03-03 19:49:43,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049882971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:43,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698870394] [2022-03-03 19:49:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:43,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:43,801 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:43,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:49:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:43,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:43,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:43,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698870394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:43,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:43,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 19:49:43,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404271978] [2022-03-03 19:49:43,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:49:43,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:49:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:49:43,905 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) [2022-03-03 19:49:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:44,062 INFO L93 Difference]: Finished difference Result 4784 states and 15583 transitions. [2022-03-03 19:49:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:49:44,062 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 [2022-03-03 19:49:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:44,071 INFO L225 Difference]: With dead ends: 4784 [2022-03-03 19:49:44,071 INFO L226 Difference]: Without dead ends: 4747 [2022-03-03 19:49:44,071 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 [2022-03-03 19:49:44,071 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:44,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:49:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-03-03 19:49:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3475. [2022-03-03 19:49:44,128 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) [2022-03-03 19:49:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 12126 transitions. [2022-03-03 19:49:44,136 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 12126 transitions. Word has length 27 [2022-03-03 19:49:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:44,136 INFO L470 AbstractCegarLoop]: Abstraction has 3475 states and 12126 transitions. [2022-03-03 19:49:44,136 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) [2022-03-03 19:49:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 12126 transitions. [2022-03-03 19:49:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:44,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:44,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:44,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:49:44,358 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 [2022-03-03 19:49:44,359 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1380238831, now seen corresponding path program 8 times [2022-03-03 19:49:44,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:44,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237747967] [2022-03-03 19:49:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:44,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:44,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:44,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237747967] [2022-03-03 19:49:44,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237747967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:44,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215563809] [2022-03-03 19:49:44,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:44,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:44,397 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:44,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:49:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:44,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:44,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215563809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:44,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:44,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 19:49:44,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985070796] [2022-03-03 19:49:44,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:49:44,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:49:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:49:44,536 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) [2022-03-03 19:49:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:44,725 INFO L93 Difference]: Finished difference Result 4950 states and 16086 transitions. [2022-03-03 19:49:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:49:44,725 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 [2022-03-03 19:49:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:44,733 INFO L225 Difference]: With dead ends: 4950 [2022-03-03 19:49:44,734 INFO L226 Difference]: Without dead ends: 4950 [2022-03-03 19:49:44,734 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 [2022-03-03 19:49:44,734 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:44,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:49:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-03-03 19:49:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3463. [2022-03-03 19:49:44,784 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) [2022-03-03 19:49:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 12049 transitions. [2022-03-03 19:49:44,791 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 12049 transitions. Word has length 27 [2022-03-03 19:49:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:44,791 INFO L470 AbstractCegarLoop]: Abstraction has 3463 states and 12049 transitions. [2022-03-03 19:49:44,791 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) [2022-03-03 19:49:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 12049 transitions. [2022-03-03 19:49:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:44,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:44,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:44,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-03 19:49:45,004 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 [2022-03-03 19:49:45,005 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1293927831, now seen corresponding path program 13 times [2022-03-03 19:49:45,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:45,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587218642] [2022-03-03 19:49:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:45,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:45,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587218642] [2022-03-03 19:49:45,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587218642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:45,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309392342] [2022-03-03 19:49:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:45,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:45,045 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:49:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:45,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:45,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309392342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:45,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:45,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:45,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004854762] [2022-03-03 19:49:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:45,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:45,298 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) [2022-03-03 19:49:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:46,595 INFO L93 Difference]: Finished difference Result 13772 states and 44128 transitions. [2022-03-03 19:49:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:49:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:46,625 INFO L225 Difference]: With dead ends: 13772 [2022-03-03 19:49:46,625 INFO L226 Difference]: Without dead ends: 13772 [2022-03-03 19:49:46,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1770, Invalid=6602, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:49:46,626 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 [2022-03-03 19:49:46,626 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] [2022-03-03 19:49:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-03-03 19:49:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 4598. [2022-03-03 19:49:46,796 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) [2022-03-03 19:49:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16425 transitions. [2022-03-03 19:49:46,807 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16425 transitions. Word has length 27 [2022-03-03 19:49:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:46,807 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16425 transitions. [2022-03-03 19:49:46,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16425 transitions. [2022-03-03 19:49:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:46,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:46,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:46,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:47,027 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 [2022-03-03 19:49:47,027 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1100027163, now seen corresponding path program 14 times [2022-03-03 19:49:47,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:47,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667914739] [2022-03-03 19:49:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:47,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:47,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667914739] [2022-03-03 19:49:47,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667914739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:47,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138334899] [2022-03-03 19:49:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:47,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:47,062 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:47,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:49:47,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:47,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:47,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138334899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:47,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:47,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:47,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812097525] [2022-03-03 19:49:47,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:47,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:47,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:47,263 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) [2022-03-03 19:49:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:48,334 INFO L93 Difference]: Finished difference Result 11895 states and 38033 transitions. [2022-03-03 19:49:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:49:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:48,357 INFO L225 Difference]: With dead ends: 11895 [2022-03-03 19:49:48,357 INFO L226 Difference]: Without dead ends: 11895 [2022-03-03 19:49:48,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:49:48,357 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 699 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:48,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 269 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:49:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2022-03-03 19:49:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 4597. [2022-03-03 19:49:48,475 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) [2022-03-03 19:49:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 16414 transitions. [2022-03-03 19:49:48,484 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 16414 transitions. Word has length 27 [2022-03-03 19:49:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:48,484 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 16414 transitions. [2022-03-03 19:49:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 16414 transitions. [2022-03-03 19:49:48,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:48,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:48,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:48,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:48,706 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 [2022-03-03 19:49:48,707 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1526676838, now seen corresponding path program 15 times [2022-03-03 19:49:48,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:48,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397291783] [2022-03-03 19:49:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:48,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:48,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:48,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397291783] [2022-03-03 19:49:48,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397291783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:48,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609060405] [2022-03-03 19:49:48,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:48,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:48,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:48,749 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:48,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:49:48,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:49:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:48,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:48,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609060405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:48,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:48,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-03 19:49:48,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869272161] [2022-03-03 19:49:48,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:48,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:49:48,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:49:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:49:48,920 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) [2022-03-03 19:49:49,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:49,097 INFO L93 Difference]: Finished difference Result 6491 states and 22125 transitions. [2022-03-03 19:49:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:49:49,097 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 [2022-03-03 19:49:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:49,110 INFO L225 Difference]: With dead ends: 6491 [2022-03-03 19:49:49,110 INFO L226 Difference]: Without dead ends: 6480 [2022-03-03 19:49:49,110 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 [2022-03-03 19:49:49,110 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 [2022-03-03 19:49:49,111 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] [2022-03-03 19:49:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-03-03 19:49:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 4687. [2022-03-03 19:49:49,182 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) [2022-03-03 19:49:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 16749 transitions. [2022-03-03 19:49:49,224 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 16749 transitions. Word has length 27 [2022-03-03 19:49:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:49,224 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 16749 transitions. [2022-03-03 19:49:49,225 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) [2022-03-03 19:49:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 16749 transitions. [2022-03-03 19:49:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:49,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:49,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:49,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:49,446 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 [2022-03-03 19:49:49,446 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1074696534, now seen corresponding path program 16 times [2022-03-03 19:49:49,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:49,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589928384] [2022-03-03 19:49:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:49,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:49,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:49,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589928384] [2022-03-03 19:49:49,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589928384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:49,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713673918] [2022-03-03 19:49:49,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:49,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:49,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:49,484 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:49:49,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:49,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:49,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713673918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:49,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:49,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-03-03 19:49:49,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116139471] [2022-03-03 19:49:49,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:49,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:49:49,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:49,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:49:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:49:49,623 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) [2022-03-03 19:49:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:49,866 INFO L93 Difference]: Finished difference Result 7410 states and 24751 transitions. [2022-03-03 19:49:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:49:49,866 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 [2022-03-03 19:49:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:49,880 INFO L225 Difference]: With dead ends: 7410 [2022-03-03 19:49:49,881 INFO L226 Difference]: Without dead ends: 7410 [2022-03-03 19:49:49,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:49:49,881 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 [2022-03-03 19:49:49,881 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] [2022-03-03 19:49:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-03-03 19:49:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 4582. [2022-03-03 19:49:49,957 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) [2022-03-03 19:49:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16325 transitions. [2022-03-03 19:49:49,967 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16325 transitions. Word has length 27 [2022-03-03 19:49:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:49,967 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 16325 transitions. [2022-03-03 19:49:49,968 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) [2022-03-03 19:49:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16325 transitions. [2022-03-03 19:49:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:49,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:49,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:49,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:50,189 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 [2022-03-03 19:49:50,189 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash 728117397, now seen corresponding path program 17 times [2022-03-03 19:49:50,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:50,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503929030] [2022-03-03 19:49:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:50,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:50,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503929030] [2022-03-03 19:49:50,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503929030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:50,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396585869] [2022-03-03 19:49:50,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:50,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:50,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:50,236 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:50,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:49:50,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:50,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:49:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:50,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:50,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396585869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:50,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:50,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 19:49:50,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210158906] [2022-03-03 19:49:50,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:50,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:50,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:50,350 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) [2022-03-03 19:49:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:51,128 INFO L93 Difference]: Finished difference Result 12614 states and 40253 transitions. [2022-03-03 19:49:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:49:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:51,159 INFO L225 Difference]: With dead ends: 12614 [2022-03-03 19:49:51,159 INFO L226 Difference]: Without dead ends: 12614 [2022-03-03 19:49:51,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:49:51,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 549 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:51,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 215 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12614 states. [2022-03-03 19:49:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 4598. [2022-03-03 19:49:51,275 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) [2022-03-03 19:49:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16389 transitions. [2022-03-03 19:49:51,286 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16389 transitions. Word has length 27 [2022-03-03 19:49:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:51,286 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16389 transitions. [2022-03-03 19:49:51,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16389 transitions. [2022-03-03 19:49:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:51,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:51,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:51,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:51,507 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 [2022-03-03 19:49:51,507 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash 538899099, now seen corresponding path program 18 times [2022-03-03 19:49:51,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:51,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358217214] [2022-03-03 19:49:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:51,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:51,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358217214] [2022-03-03 19:49:51,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358217214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:51,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784129796] [2022-03-03 19:49:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:51,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:51,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:51,555 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:51,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:49:51,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:49:51,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:51,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:51,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:51,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784129796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:51,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:51,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-03-03 19:49:51,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116141897] [2022-03-03 19:49:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:51,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:49:51,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:49:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:49:51,726 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) [2022-03-03 19:49:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:52,578 INFO L93 Difference]: Finished difference Result 12094 states and 38855 transitions. [2022-03-03 19:49:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 19:49:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:52,602 INFO L225 Difference]: With dead ends: 12094 [2022-03-03 19:49:52,602 INFO L226 Difference]: Without dead ends: 12086 [2022-03-03 19:49:52,603 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 [2022-03-03 19:49:52,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 610 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-03 19:49:52,603 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] [2022-03-03 19:49:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-03-03 19:49:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4592. [2022-03-03 19:49:52,729 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) [2022-03-03 19:49:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-03 19:49:52,739 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-03 19:49:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:52,739 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-03 19:49:52,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-03 19:49:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:52,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:52,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:52,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:52,960 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 [2022-03-03 19:49:52,960 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1928420315, now seen corresponding path program 19 times [2022-03-03 19:49:52,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:52,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486188779] [2022-03-03 19:49:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:52,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:52,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486188779] [2022-03-03 19:49:52,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486188779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:52,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650631879] [2022-03-03 19:49:52,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:52,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:52,997 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:52,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:49:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:53,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:53,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650631879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:53,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:53,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:53,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291330532] [2022-03-03 19:49:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:53,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:53,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:53,204 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) [2022-03-03 19:49:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:53,935 INFO L93 Difference]: Finished difference Result 10329 states and 32586 transitions. [2022-03-03 19:49:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:49:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:53,954 INFO L225 Difference]: With dead ends: 10329 [2022-03-03 19:49:53,954 INFO L226 Difference]: Without dead ends: 10329 [2022-03-03 19:49:53,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1236, Invalid=3876, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:49:53,955 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 843 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:53,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 244 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2022-03-03 19:49:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 4598. [2022-03-03 19:49:54,069 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) [2022-03-03 19:49:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16383 transitions. [2022-03-03 19:49:54,078 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16383 transitions. Word has length 27 [2022-03-03 19:49:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:54,078 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16383 transitions. [2022-03-03 19:49:54,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16383 transitions. [2022-03-03 19:49:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:54,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:54,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:54,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:54,295 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 [2022-03-03 19:49:54,295 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash -583897511, now seen corresponding path program 20 times [2022-03-03 19:49:54,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:54,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676619144] [2022-03-03 19:49:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:54,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:54,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:54,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676619144] [2022-03-03 19:49:54,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676619144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:54,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464892611] [2022-03-03 19:49:54,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:54,349 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:54,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:49:54,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:54,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464892611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:54,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:54,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-03-03 19:49:54,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332100651] [2022-03-03 19:49:54,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:54,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:49:54,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:49:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:49:54,550 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) [2022-03-03 19:49:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:55,460 INFO L93 Difference]: Finished difference Result 10595 states and 33851 transitions. [2022-03-03 19:49:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:49:55,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:55,481 INFO L225 Difference]: With dead ends: 10595 [2022-03-03 19:49:55,481 INFO L226 Difference]: Without dead ends: 10587 [2022-03-03 19:49:55,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1514, Invalid=5968, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:49:55,482 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 743 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:55,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 262 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:49:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-03-03 19:49:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 4592. [2022-03-03 19:49:55,603 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) [2022-03-03 19:49:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-03-03 19:49:55,613 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-03-03 19:49:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:55,613 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-03-03 19:49:55,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-03-03 19:49:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:55,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:55,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:55,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:55,821 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 [2022-03-03 19:49:55,821 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1207160328, now seen corresponding path program 21 times [2022-03-03 19:49:55,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:55,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898940434] [2022-03-03 19:49:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:55,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:55,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:55,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898940434] [2022-03-03 19:49:55,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898940434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:55,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619719616] [2022-03-03 19:49:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:55,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:55,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:55,862 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:55,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:49:55,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:55,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:49:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:55,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:56,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619719616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:56,033 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:56,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-03 19:49:56,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972686490] [2022-03-03 19:49:56,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:56,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:49:56,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:49:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:49:56,034 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) [2022-03-03 19:49:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:56,331 INFO L93 Difference]: Finished difference Result 7411 states and 24660 transitions. [2022-03-03 19:49:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:49:56,331 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 [2022-03-03 19:49:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:56,345 INFO L225 Difference]: With dead ends: 7411 [2022-03-03 19:49:56,345 INFO L226 Difference]: Without dead ends: 7411 [2022-03-03 19:49:56,345 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 [2022-03-03 19:49:56,346 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 [2022-03-03 19:49:56,346 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] [2022-03-03 19:49:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-03-03 19:49:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5288. [2022-03-03 19:49:56,426 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) [2022-03-03 19:49:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 18767 transitions. [2022-03-03 19:49:56,438 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 18767 transitions. Word has length 27 [2022-03-03 19:49:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:56,438 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 18767 transitions. [2022-03-03 19:49:56,439 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) [2022-03-03 19:49:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 18767 transitions. [2022-03-03 19:49:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:56,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:56,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:56,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 19:49:56,653 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 [2022-03-03 19:49:56,653 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:56,654 INFO L85 PathProgramCache]: Analyzing trace with hash 459370969, now seen corresponding path program 22 times [2022-03-03 19:49:56,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:56,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376900320] [2022-03-03 19:49:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:56,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376900320] [2022-03-03 19:49:56,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376900320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537045353] [2022-03-03 19:49:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:56,690 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:49:56,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:56,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:56,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:56,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537045353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:56,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:56,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:56,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941895455] [2022-03-03 19:49:56,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:56,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:56,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:56,877 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) [2022-03-03 19:49:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:57,476 INFO L93 Difference]: Finished difference Result 12338 states and 40499 transitions. [2022-03-03 19:49:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:49:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:57,534 INFO L225 Difference]: With dead ends: 12338 [2022-03-03 19:49:57,534 INFO L226 Difference]: Without dead ends: 12338 [2022-03-03 19:49:57,534 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 [2022-03-03 19:49:57,535 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 484 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:57,535 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] [2022-03-03 19:49:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-03-03 19:49:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 6120. [2022-03-03 19:49:57,657 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) [2022-03-03 19:49:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 21822 transitions. [2022-03-03 19:49:57,672 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 21822 transitions. Word has length 27 [2022-03-03 19:49:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:57,672 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 21822 transitions. [2022-03-03 19:49:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 21822 transitions. [2022-03-03 19:49:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:57,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:57,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:57,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 19:49:57,893 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 [2022-03-03 19:49:57,893 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash 270152671, now seen corresponding path program 23 times [2022-03-03 19:49:57,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:57,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963075752] [2022-03-03 19:49:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:57,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:57,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:57,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963075752] [2022-03-03 19:49:57,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963075752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:57,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435836947] [2022-03-03 19:49:57,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:57,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:57,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:57,925 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:57,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:49:57,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:49:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:57,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:58,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435836947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:58,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:58,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:58,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84441408] [2022-03-03 19:49:58,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:58,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:58,097 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) [2022-03-03 19:49:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:58,590 INFO L93 Difference]: Finished difference Result 11967 states and 39549 transitions. [2022-03-03 19:49:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:49:58,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:49:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:58,618 INFO L225 Difference]: With dead ends: 11967 [2022-03-03 19:49:58,618 INFO L226 Difference]: Without dead ends: 11959 [2022-03-03 19:49:58,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:49:58,619 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 479 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:49:58,619 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] [2022-03-03 19:49:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2022-03-03 19:49:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 6112. [2022-03-03 19:49:58,777 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) [2022-03-03 19:49:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21792 transitions. [2022-03-03 19:49:58,791 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21792 transitions. Word has length 27 [2022-03-03 19:49:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:58,791 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 21792 transitions. [2022-03-03 19:49:58,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21792 transitions. [2022-03-03 19:49:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:58,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:58,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:58,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:59,013 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 [2022-03-03 19:49:59,013 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash -941485803, now seen corresponding path program 9 times [2022-03-03 19:49:59,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:59,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118090831] [2022-03-03 19:49:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:59,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118090831] [2022-03-03 19:49:59,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118090831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:59,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173868656] [2022-03-03 19:49:59,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:49:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:59,049 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:59,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:49:59,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:49:59,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:59,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:49:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173868656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:59,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:59,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-03-03 19:49:59,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878940551] [2022-03-03 19:49:59,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:59,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:49:59,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:49:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:49:59,197 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) [2022-03-03 19:49:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:59,420 INFO L93 Difference]: Finished difference Result 7455 states and 25610 transitions. [2022-03-03 19:49:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:49:59,420 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 [2022-03-03 19:49:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:59,434 INFO L225 Difference]: With dead ends: 7455 [2022-03-03 19:49:59,435 INFO L226 Difference]: Without dead ends: 7455 [2022-03-03 19:49:59,435 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 [2022-03-03 19:49:59,435 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 [2022-03-03 19:49:59,435 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] [2022-03-03 19:49:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-03-03 19:49:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6153. [2022-03-03 19:49:59,533 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) [2022-03-03 19:49:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21926 transitions. [2022-03-03 19:49:59,547 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21926 transitions. Word has length 27 [2022-03-03 19:49:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:59,549 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 21926 transitions. [2022-03-03 19:49:59,549 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) [2022-03-03 19:49:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21926 transitions. [2022-03-03 19:49:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:49:59,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:59,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:59,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:59,775 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 [2022-03-03 19:49:59,775 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:49:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash 913534931, now seen corresponding path program 24 times [2022-03-03 19:49:59,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:59,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285481779] [2022-03-03 19:49:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:59,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:59,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285481779] [2022-03-03 19:49:59,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285481779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:59,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167480611] [2022-03-03 19:49:59,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:59,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:59,808 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:59,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:49:59,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:49:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:59,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:49:59,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167480611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:59,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:59,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:49:59,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695165371] [2022-03-03 19:49:59,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:59,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:49:59,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:49:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:49:59,978 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) [2022-03-03 19:50:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:00,532 INFO L93 Difference]: Finished difference Result 11867 states and 39346 transitions. [2022-03-03 19:50:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:50:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:00,555 INFO L225 Difference]: With dead ends: 11867 [2022-03-03 19:50:00,555 INFO L226 Difference]: Without dead ends: 11835 [2022-03-03 19:50:00,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:50:00,556 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 [2022-03-03 19:50:00,556 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] [2022-03-03 19:50:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-03-03 19:50:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6181. [2022-03-03 19:50:00,704 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) [2022-03-03 19:50:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 22008 transitions. [2022-03-03 19:50:00,718 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 22008 transitions. Word has length 27 [2022-03-03 19:50:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:00,718 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 22008 transitions. [2022-03-03 19:50:00,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 22008 transitions. [2022-03-03 19:50:00,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:00,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:00,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:00,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:00,940 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 [2022-03-03 19:50:00,941 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1225890903, now seen corresponding path program 25 times [2022-03-03 19:50:00,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:00,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241310200] [2022-03-03 19:50:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:00,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:00,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241310200] [2022-03-03 19:50:00,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241310200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:00,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570859215] [2022-03-03 19:50:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:00,973 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:00,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:50:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:01,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:01,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570859215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:01,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:01,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:50:01,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718396058] [2022-03-03 19:50:01,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:01,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:50:01,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:01,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:50:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:01,118 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) [2022-03-03 19:50:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:02,320 INFO L93 Difference]: Finished difference Result 11509 states and 36905 transitions. [2022-03-03 19:50:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 19:50:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:02,343 INFO L225 Difference]: With dead ends: 11509 [2022-03-03 19:50:02,343 INFO L226 Difference]: Without dead ends: 11509 [2022-03-03 19:50:02,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1502, Invalid=5808, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:50:02,344 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 [2022-03-03 19:50:02,345 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] [2022-03-03 19:50:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2022-03-03 19:50:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6427. [2022-03-03 19:50:02,508 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) [2022-03-03 19:50:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 22755 transitions. [2022-03-03 19:50:02,523 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 22755 transitions. Word has length 27 [2022-03-03 19:50:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 22755 transitions. [2022-03-03 19:50:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 22755 transitions. [2022-03-03 19:50:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:02,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:02,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:02,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 19:50:02,744 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 [2022-03-03 19:50:02,745 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1286426923, now seen corresponding path program 26 times [2022-03-03 19:50:02,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:02,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034258678] [2022-03-03 19:50:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:02,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:02,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034258678] [2022-03-03 19:50:02,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034258678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:02,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129633254] [2022-03-03 19:50:02,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:02,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:02,807 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:02,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:50:02,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:02,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:03,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129633254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:03,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:03,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:50:03,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531755628] [2022-03-03 19:50:03,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:03,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:50:03,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:50:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:03,034 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) [2022-03-03 19:50:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:04,174 INFO L93 Difference]: Finished difference Result 11437 states and 37488 transitions. [2022-03-03 19:50:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 19:50:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:04,199 INFO L225 Difference]: With dead ends: 11437 [2022-03-03 19:50:04,199 INFO L226 Difference]: Without dead ends: 11429 [2022-03-03 19:50:04,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1456, Invalid=6200, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:50:04,200 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:04,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 241 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:50:04,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2022-03-03 19:50:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 6417. [2022-03-03 19:50:04,348 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) [2022-03-03 19:50:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 22710 transitions. [2022-03-03 19:50:04,364 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 22710 transitions. Word has length 27 [2022-03-03 19:50:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:04,364 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 22710 transitions. [2022-03-03 19:50:04,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 22710 transitions. [2022-03-03 19:50:04,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:04,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:04,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:04,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:04,607 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 [2022-03-03 19:50:04,607 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2131398375, now seen corresponding path program 27 times [2022-03-03 19:50:04,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:04,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202079519] [2022-03-03 19:50:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:04,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:04,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202079519] [2022-03-03 19:50:04,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202079519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:04,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408365427] [2022-03-03 19:50:04,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:04,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:04,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:04,664 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:04,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:50:04,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:50:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:04,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:04,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408365427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:04,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:04,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:50:04,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521073840] [2022-03-03 19:50:04,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:50:04,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:50:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:50:04,835 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) [2022-03-03 19:50:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:05,638 INFO L93 Difference]: Finished difference Result 10978 states and 36562 transitions. [2022-03-03 19:50:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:50:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:05,660 INFO L225 Difference]: With dead ends: 10978 [2022-03-03 19:50:05,660 INFO L226 Difference]: Without dead ends: 10946 [2022-03-03 19:50:05,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=932, Invalid=3624, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 19:50:05,661 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:05,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 210 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:50:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-03-03 19:50:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 6457. [2022-03-03 19:50:05,796 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) [2022-03-03 19:50:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 22824 transitions. [2022-03-03 19:50:05,811 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 22824 transitions. Word has length 27 [2022-03-03 19:50:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:05,811 INFO L470 AbstractCegarLoop]: Abstraction has 6457 states and 22824 transitions. [2022-03-03 19:50:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 22824 transitions. [2022-03-03 19:50:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:05,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:05,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:05,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:06,035 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 [2022-03-03 19:50:06,035 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1828165507, now seen corresponding path program 28 times [2022-03-03 19:50:06,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:06,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913462912] [2022-03-03 19:50:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:06,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:06,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913462912] [2022-03-03 19:50:06,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913462912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:06,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202465141] [2022-03-03 19:50:06,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:06,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:06,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:06,097 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:06,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:50:06,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:06,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:06,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:06,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202465141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:06,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:06,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:50:06,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840142369] [2022-03-03 19:50:06,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:06,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:50:06,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:50:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:50:06,295 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) [2022-03-03 19:50:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:06,899 INFO L93 Difference]: Finished difference Result 9242 states and 30901 transitions. [2022-03-03 19:50:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:50:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:06,917 INFO L225 Difference]: With dead ends: 9242 [2022-03-03 19:50:06,917 INFO L226 Difference]: Without dead ends: 9242 [2022-03-03 19:50:06,918 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 [2022-03-03 19:50:06,918 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 310 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:50:06,918 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] [2022-03-03 19:50:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-03-03 19:50:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 6587. [2022-03-03 19:50:07,052 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) [2022-03-03 19:50:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 23217 transitions. [2022-03-03 19:50:07,068 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 23217 transitions. Word has length 27 [2022-03-03 19:50:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:07,068 INFO L470 AbstractCegarLoop]: Abstraction has 6587 states and 23217 transitions. [2022-03-03 19:50:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 23217 transitions. [2022-03-03 19:50:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:07,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:07,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:07,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 19:50:07,279 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 [2022-03-03 19:50:07,279 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1881628206, now seen corresponding path program 18 times [2022-03-03 19:50:07,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:07,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639807900] [2022-03-03 19:50:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:07,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:07,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639807900] [2022-03-03 19:50:07,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639807900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:07,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809634477] [2022-03-03 19:50:07,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:07,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:07,315 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:07,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:50:07,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:50:07,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:07,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:07,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809634477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:07,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:07,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:50:07,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974605207] [2022-03-03 19:50:07,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:07,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:50:07,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:50:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:50:07,468 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) [2022-03-03 19:50:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:07,884 INFO L93 Difference]: Finished difference Result 11132 states and 37515 transitions. [2022-03-03 19:50:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:50:07,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:07,904 INFO L225 Difference]: With dead ends: 11132 [2022-03-03 19:50:07,905 INFO L226 Difference]: Without dead ends: 11132 [2022-03-03 19:50:07,905 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 [2022-03-03 19:50:07,905 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 [2022-03-03 19:50:07,905 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] [2022-03-03 19:50:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-03-03 19:50:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 6717. [2022-03-03 19:50:08,041 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) [2022-03-03 19:50:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 23595 transitions. [2022-03-03 19:50:08,058 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 23595 transitions. Word has length 27 [2022-03-03 19:50:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 23595 transitions. [2022-03-03 19:50:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 23595 transitions. [2022-03-03 19:50:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:08,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:08,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:08,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:08,282 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 [2022-03-03 19:50:08,282 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2088141458, now seen corresponding path program 19 times [2022-03-03 19:50:08,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:08,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274174418] [2022-03-03 19:50:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:08,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:08,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274174418] [2022-03-03 19:50:08,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274174418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:08,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429482715] [2022-03-03 19:50:08,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:08,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:08,329 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:08,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:50:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:08,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:50:08,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429482715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:08,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:08,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 19:50:08,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976481403] [2022-03-03 19:50:08,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:08,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:50:08,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:08,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:50:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:50:08,497 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) [2022-03-03 19:50:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:08,811 INFO L93 Difference]: Finished difference Result 9155 states and 31004 transitions. [2022-03-03 19:50:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:50:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:08,828 INFO L225 Difference]: With dead ends: 9155 [2022-03-03 19:50:08,829 INFO L226 Difference]: Without dead ends: 9145 [2022-03-03 19:50:08,829 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 [2022-03-03 19:50:08,834 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:50:08,834 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] [2022-03-03 19:50:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-03-03 19:50:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 6962. [2022-03-03 19:50:08,944 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) [2022-03-03 19:50:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 24508 transitions. [2022-03-03 19:50:08,960 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 24508 transitions. Word has length 27 [2022-03-03 19:50:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:08,960 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 24508 transitions. [2022-03-03 19:50:08,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 24508 transitions. [2022-03-03 19:50:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:08,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:08,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:08,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:09,184 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 [2022-03-03 19:50:09,184 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1818737390, now seen corresponding path program 20 times [2022-03-03 19:50:09,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:09,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140999830] [2022-03-03 19:50:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:09,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:09,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140999830] [2022-03-03 19:50:09,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140999830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:09,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584198701] [2022-03-03 19:50:09,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:09,221 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:09,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:50:09,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:09,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:50:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:09,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:09,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584198701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:09,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:09,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 19:50:09,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517808861] [2022-03-03 19:50:09,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:09,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:50:09,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:09,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:50:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:50:09,352 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) [2022-03-03 19:50:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:09,652 INFO L93 Difference]: Finished difference Result 11751 states and 39739 transitions. [2022-03-03 19:50:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:50:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:50:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:09,677 INFO L225 Difference]: With dead ends: 11751 [2022-03-03 19:50:09,677 INFO L226 Difference]: Without dead ends: 11735 [2022-03-03 19:50:09,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:50:09,678 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-03 19:50:09,678 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] [2022-03-03 19:50:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-03-03 19:50:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 7106. [2022-03-03 19:50:09,818 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) [2022-03-03 19:50:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 24920 transitions. [2022-03-03 19:50:09,834 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 24920 transitions. Word has length 27 [2022-03-03 19:50:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 24920 transitions. [2022-03-03 19:50:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 24920 transitions. [2022-03-03 19:50:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:50:09,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:09,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:09,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 19:50:10,053 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 [2022-03-03 19:50:10,054 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1104222989, now seen corresponding path program 10 times [2022-03-03 19:50:10,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:10,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432961720] [2022-03-03 19:50:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:10,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:10,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432961720] [2022-03-03 19:50:10,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432961720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:10,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961390420] [2022-03-03 19:50:10,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:10,099 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:10,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:50:10,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:10,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:10,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:50:10,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:10,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:10,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961390420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:10,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:10,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-03 19:50:10,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104017815] [2022-03-03 19:50:10,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:10,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:50:10,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:50:10,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:50:10,276 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) [2022-03-03 19:50:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:10,652 INFO L93 Difference]: Finished difference Result 8555 states and 28945 transitions. [2022-03-03 19:50:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:50:10,653 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 [2022-03-03 19:50:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:10,670 INFO L225 Difference]: With dead ends: 8555 [2022-03-03 19:50:10,670 INFO L226 Difference]: Without dead ends: 8555 [2022-03-03 19:50:10,670 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 [2022-03-03 19:50:10,671 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-03 19:50:10,671 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] [2022-03-03 19:50:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-03-03 19:50:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 7022. [2022-03-03 19:50:10,781 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) [2022-03-03 19:50:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 24616 transitions. [2022-03-03 19:50:10,797 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 24616 transitions. Word has length 27 [2022-03-03 19:50:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:10,798 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 24616 transitions. [2022-03-03 19:50:10,798 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) [2022-03-03 19:50:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 24616 transitions. [2022-03-03 19:50:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:10,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:10,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:10,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:11,023 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 [2022-03-03 19:50:11,023 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1885222371, now seen corresponding path program 29 times [2022-03-03 19:50:11,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:11,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848823151] [2022-03-03 19:50:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:11,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:11,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848823151] [2022-03-03 19:50:11,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848823151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:11,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625943481] [2022-03-03 19:50:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:11,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:11,187 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:11,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:50:11,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:50:11,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:11,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:50:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:11,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:50:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:11,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:11,617 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:50:11,617 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 [2022-03-03 19:50:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:11,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-03 19:50:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:11,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625943481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:11,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:11,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-03-03 19:50:11,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228792229] [2022-03-03 19:50:11,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:11,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:50:11,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:50:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:50:11,719 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) [2022-03-03 19:50:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:11,990 INFO L93 Difference]: Finished difference Result 7838 states and 27083 transitions. [2022-03-03 19:50:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:50:11,990 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 [2022-03-03 19:50:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:12,007 INFO L225 Difference]: With dead ends: 7838 [2022-03-03 19:50:12,007 INFO L226 Difference]: Without dead ends: 7769 [2022-03-03 19:50:12,007 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 [2022-03-03 19:50:12,008 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 [2022-03-03 19:50:12,008 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] [2022-03-03 19:50:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7769 states. [2022-03-03 19:50:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7769 to 7214. [2022-03-03 19:50:12,128 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) [2022-03-03 19:50:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 25254 transitions. [2022-03-03 19:50:12,147 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 25254 transitions. Word has length 30 [2022-03-03 19:50:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:12,147 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 25254 transitions. [2022-03-03 19:50:12,147 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) [2022-03-03 19:50:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 25254 transitions. [2022-03-03 19:50:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:12,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:12,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:12,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:12,371 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 [2022-03-03 19:50:12,371 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash -428025768, now seen corresponding path program 11 times [2022-03-03 19:50:12,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:12,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291838361] [2022-03-03 19:50:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:12,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:12,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:12,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291838361] [2022-03-03 19:50:12,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291838361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:12,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365869182] [2022-03-03 19:50:12,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:12,702 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:12,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:50:12,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:50:12,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:12,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:50:12,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:12,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:12,961 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 [2022-03-03 19:50:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:12,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:13,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:13,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-03 19:50:13,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:13,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:13,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:13,344 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 [2022-03-03 19:50:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:13,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365869182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:13,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:13,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-03-03 19:50:13,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037207550] [2022-03-03 19:50:13,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:50:13,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:50:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:50:13,513 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) [2022-03-03 19:50:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:19,367 INFO L93 Difference]: Finished difference Result 12273 states and 38840 transitions. [2022-03-03 19:50:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 19:50:19,367 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 [2022-03-03 19:50:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:19,391 INFO L225 Difference]: With dead ends: 12273 [2022-03-03 19:50:19,391 INFO L226 Difference]: Without dead ends: 12228 [2022-03-03 19:50:19,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2071, Invalid=13181, Unknown=0, NotChecked=0, Total=15252 [2022-03-03 19:50:19,393 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 824 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3427 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:19,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 767 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3427 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:50:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12228 states. [2022-03-03 19:50:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12228 to 7230. [2022-03-03 19:50:19,598 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) [2022-03-03 19:50:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25302 transitions. [2022-03-03 19:50:19,614 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25302 transitions. Word has length 30 [2022-03-03 19:50:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:19,614 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25302 transitions. [2022-03-03 19:50:19,615 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) [2022-03-03 19:50:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25302 transitions. [2022-03-03 19:50:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:19,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:19,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:19,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:50:19,839 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 [2022-03-03 19:50:19,839 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash 999153544, now seen corresponding path program 12 times [2022-03-03 19:50:19,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:19,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792973146] [2022-03-03 19:50:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:19,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:20,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:20,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792973146] [2022-03-03 19:50:20,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792973146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:20,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340965385] [2022-03-03 19:50:20,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:20,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:20,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:20,164 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:20,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:50:20,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:50:20,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:50:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:20,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:20,499 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 [2022-03-03 19:50:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:20,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:21,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:21,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:21,122 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 [2022-03-03 19:50:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:21,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:50:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:21,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340965385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:21,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:21,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-03 19:50:21,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693804314] [2022-03-03 19:50:21,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:21,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:50:21,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:50:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:50:21,265 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) [2022-03-03 19:50:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:40,696 INFO L93 Difference]: Finished difference Result 14121 states and 45782 transitions. [2022-03-03 19:50:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-03-03 19:50:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:40,726 INFO L225 Difference]: With dead ends: 14121 [2022-03-03 19:50:40,726 INFO L226 Difference]: Without dead ends: 14080 [2022-03-03 19:50:40,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27018 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=6199, Invalid=61141, Unknown=0, NotChecked=0, Total=67340 [2022-03-03 19:50:40,731 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1291 mSDsluCounter, 2008 mSDsCounter, 0 mSdLazyCounter, 5543 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:40,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1092 Invalid, 6104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 5543 Invalid, 0 Unknown, 172 Unchecked, 2.6s Time] [2022-03-03 19:50:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14080 states. [2022-03-03 19:50:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14080 to 7421. [2022-03-03 19:50:40,946 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) [2022-03-03 19:50:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7421 states to 7421 states and 25926 transitions. [2022-03-03 19:50:40,964 INFO L78 Accepts]: Start accepts. Automaton has 7421 states and 25926 transitions. Word has length 30 [2022-03-03 19:50:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:40,964 INFO L470 AbstractCegarLoop]: Abstraction has 7421 states and 25926 transitions. [2022-03-03 19:50:40,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7421 states and 25926 transitions. [2022-03-03 19:50:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:40,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:40,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:40,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:41,191 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 [2022-03-03 19:50:41,191 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1036021596, now seen corresponding path program 13 times [2022-03-03 19:50:41,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:41,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262139928] [2022-03-03 19:50:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:41,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:41,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262139928] [2022-03-03 19:50:41,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262139928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:41,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539750934] [2022-03-03 19:50:41,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:50:41,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:41,497 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:41,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:50:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:50:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:41,884 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 [2022-03-03 19:50:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:41,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:42,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:42,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:50:42,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:42,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:42,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:42,253 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 [2022-03-03 19:50:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:42,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539750934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:42,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:42,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:50:42,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298745267] [2022-03-03 19:50:42,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:42,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:50:42,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:50:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:50:42,394 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) [2022-03-03 19:50:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:46,798 INFO L93 Difference]: Finished difference Result 12007 states and 38257 transitions. [2022-03-03 19:50:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:50:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:46,823 INFO L225 Difference]: With dead ends: 12007 [2022-03-03 19:50:46,823 INFO L226 Difference]: Without dead ends: 12004 [2022-03-03 19:50:46,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1850, Invalid=11260, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:50:46,826 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 793 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:46,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 561 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:50:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2022-03-03 19:50:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 7411. [2022-03-03 19:50:46,990 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) [2022-03-03 19:50:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25897 transitions. [2022-03-03 19:50:47,010 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25897 transitions. Word has length 30 [2022-03-03 19:50:47,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:47,010 INFO L470 AbstractCegarLoop]: Abstraction has 7411 states and 25897 transitions. [2022-03-03 19:50:47,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25897 transitions. [2022-03-03 19:50:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:47,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:47,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:47,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:47,235 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 [2022-03-03 19:50:47,235 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:47,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:47,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1895398836, now seen corresponding path program 14 times [2022-03-03 19:50:47,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:47,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244377138] [2022-03-03 19:50:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:47,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:47,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244377138] [2022-03-03 19:50:47,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244377138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:47,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919995552] [2022-03-03 19:50:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:50:47,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:47,527 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:47,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:50:47,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:50:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:50:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:47,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:47,773 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 [2022-03-03 19:50:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:47,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:48,182 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:50:48,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:50:48,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:48,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:48,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:48,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 19:50:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:48,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919995552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:48,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:48,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-03 19:50:48,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513927855] [2022-03-03 19:50:48,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:50:48,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:50:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:50:48,486 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) [2022-03-03 19:50:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:53,928 INFO L93 Difference]: Finished difference Result 12598 states and 40741 transitions. [2022-03-03 19:50:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 19:50:53,928 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 [2022-03-03 19:50:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:53,953 INFO L225 Difference]: With dead ends: 12598 [2022-03-03 19:50:53,954 INFO L226 Difference]: Without dead ends: 12439 [2022-03-03 19:50:53,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1366, Invalid=11516, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 19:50:53,955 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 677 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:53,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 876 Invalid, 3783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3011 Invalid, 0 Unknown, 616 Unchecked, 1.3s Time] [2022-03-03 19:50:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12439 states. [2022-03-03 19:50:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12439 to 7481. [2022-03-03 19:50:54,104 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) [2022-03-03 19:50:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7481 states to 7481 states and 26149 transitions. [2022-03-03 19:50:54,121 INFO L78 Accepts]: Start accepts. Automaton has 7481 states and 26149 transitions. Word has length 30 [2022-03-03 19:50:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 7481 states and 26149 transitions. [2022-03-03 19:50:54,121 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) [2022-03-03 19:50:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7481 states and 26149 transitions. [2022-03-03 19:50:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:54,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:54,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:54,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:54,347 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 [2022-03-03 19:50:54,347 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:50:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:54,348 INFO L85 PathProgramCache]: Analyzing trace with hash 491925475, now seen corresponding path program 21 times [2022-03-03 19:50:54,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:54,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296406624] [2022-03-03 19:50:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:54,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:54,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296406624] [2022-03-03 19:50:54,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296406624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:54,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780527443] [2022-03-03 19:50:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:54,692 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:54,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:50:54,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:50:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:50:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:54,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:50:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:55,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:55,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:55,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:55,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:50:55,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:55,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:55,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:55,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:50:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:55,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780527443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:55,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:55,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-03-03 19:50:55,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157717118] [2022-03-03 19:50:55,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:50:55,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:50:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:50:55,434 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) [2022-03-03 19:51:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:03,367 INFO L93 Difference]: Finished difference Result 12701 states and 41359 transitions. [2022-03-03 19:51:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-03 19:51:03,367 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 [2022-03-03 19:51:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:03,394 INFO L225 Difference]: With dead ends: 12701 [2022-03-03 19:51:03,394 INFO L226 Difference]: Without dead ends: 12654 [2022-03-03 19:51:03,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2795, Invalid=23611, Unknown=0, NotChecked=0, Total=26406 [2022-03-03 19:51:03,396 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 972 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:03,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1095 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:51:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12654 states. [2022-03-03 19:51:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12654 to 7785. [2022-03-03 19:51:03,576 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) [2022-03-03 19:51:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 27066 transitions. [2022-03-03 19:51:03,595 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 27066 transitions. Word has length 30 [2022-03-03 19:51:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:03,595 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 27066 transitions. [2022-03-03 19:51:03,595 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) [2022-03-03 19:51:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 27066 transitions. [2022-03-03 19:51:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:03,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:03,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:03,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:03,821 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 [2022-03-03 19:51:03,822 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2120239378, now seen corresponding path program 15 times [2022-03-03 19:51:03,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:03,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181199160] [2022-03-03 19:51:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:03,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:04,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:04,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181199160] [2022-03-03 19:51:04,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181199160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:04,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247283111] [2022-03-03 19:51:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:04,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:04,134 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:04,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:51:04,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:51:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:04,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:51:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:04,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:04,553 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 [2022-03-03 19:51:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:04,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:04,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:51:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:05,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247283111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:05,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:05,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-03 19:51:05,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002877597] [2022-03-03 19:51:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:05,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:05,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:05,417 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) [2022-03-03 19:51:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:09,189 INFO L93 Difference]: Finished difference Result 12241 states and 39290 transitions. [2022-03-03 19:51:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 19:51:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:51:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:09,213 INFO L225 Difference]: With dead ends: 12241 [2022-03-03 19:51:09,213 INFO L226 Difference]: Without dead ends: 12223 [2022-03-03 19:51:09,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1561, Invalid=9151, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:51:09,215 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 592 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:09,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 453 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1085 Invalid, 0 Unknown, 967 Unchecked, 0.5s Time] [2022-03-03 19:51:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12223 states. [2022-03-03 19:51:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12223 to 7791. [2022-03-03 19:51:09,364 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) [2022-03-03 19:51:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7791 states to 7791 states and 27090 transitions. [2022-03-03 19:51:09,382 INFO L78 Accepts]: Start accepts. Automaton has 7791 states and 27090 transitions. Word has length 30 [2022-03-03 19:51:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:09,382 INFO L470 AbstractCegarLoop]: Abstraction has 7791 states and 27090 transitions. [2022-03-03 19:51:09,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7791 states and 27090 transitions. [2022-03-03 19:51:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:09,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:09,394 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, 1, 1, 1] [2022-03-03 19:51:09,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:51:09,607 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 [2022-03-03 19:51:09,607 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash 680823678, now seen corresponding path program 16 times [2022-03-03 19:51:09,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:09,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393032953] [2022-03-03 19:51:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:09,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:09,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393032953] [2022-03-03 19:51:09,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393032953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:09,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827961321] [2022-03-03 19:51:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:09,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:09,899 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:09,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:51:09,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:09,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:10,232 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 [2022-03-03 19:51:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:10,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:10,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:10,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:51:10,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:10,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:10,763 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 [2022-03-03 19:51:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:10,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827961321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:10,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:10,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:51:10,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936684586] [2022-03-03 19:51:10,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:10,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:10,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:10,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:10,922 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) [2022-03-03 19:51:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:16,383 INFO L93 Difference]: Finished difference Result 13671 states and 42804 transitions. [2022-03-03 19:51:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-03 19:51:16,383 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 [2022-03-03 19:51:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:16,410 INFO L225 Difference]: With dead ends: 13671 [2022-03-03 19:51:16,410 INFO L226 Difference]: Without dead ends: 13626 [2022-03-03 19:51:16,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6376 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2443, Invalid=14327, Unknown=0, NotChecked=0, Total=16770 [2022-03-03 19:51:16,412 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1008 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:16,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 700 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2356 Invalid, 0 Unknown, 197 Unchecked, 1.1s Time] [2022-03-03 19:51:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13626 states. [2022-03-03 19:51:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13626 to 7812. [2022-03-03 19:51:16,578 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) [2022-03-03 19:51:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 27160 transitions. [2022-03-03 19:51:16,596 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 27160 transitions. Word has length 30 [2022-03-03 19:51:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:16,596 INFO L470 AbstractCegarLoop]: Abstraction has 7812 states and 27160 transitions. [2022-03-03 19:51:16,596 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) [2022-03-03 19:51:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 27160 transitions. [2022-03-03 19:51:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:16,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:16,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:16,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:16,822 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 [2022-03-03 19:51:16,822 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 550383676, now seen corresponding path program 17 times [2022-03-03 19:51:16,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:16,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593217413] [2022-03-03 19:51:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:17,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:17,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593217413] [2022-03-03 19:51:17,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593217413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:17,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66661794] [2022-03-03 19:51:17,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:51:17,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:17,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:17,164 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:17,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:51:17,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:51:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:51:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:17,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:17,462 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 [2022-03-03 19:51:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:17,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:17,781 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:51:17,782 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 [2022-03-03 19:51:17,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:17,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:17,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:17,912 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 [2022-03-03 19:51:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:18,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66661794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:18,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:18,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-03 19:51:18,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761352439] [2022-03-03 19:51:18,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:18,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:51:18,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:18,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:51:18,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:51:18,048 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) [2022-03-03 19:51:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:23,278 INFO L93 Difference]: Finished difference Result 12966 states and 41867 transitions. [2022-03-03 19:51:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:51:23,278 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 [2022-03-03 19:51:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:23,306 INFO L225 Difference]: With dead ends: 12966 [2022-03-03 19:51:23,306 INFO L226 Difference]: Without dead ends: 12921 [2022-03-03 19:51:23,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4117 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1195, Invalid=11015, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:51:23,307 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 574 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:23,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 799 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:51:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2022-03-03 19:51:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 7830. [2022-03-03 19:51:23,470 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) [2022-03-03 19:51:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 27226 transitions. [2022-03-03 19:51:23,488 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 27226 transitions. Word has length 30 [2022-03-03 19:51:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:23,489 INFO L470 AbstractCegarLoop]: Abstraction has 7830 states and 27226 transitions. [2022-03-03 19:51:23,489 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) [2022-03-03 19:51:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 27226 transitions. [2022-03-03 19:51:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:23,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:23,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:23,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 19:51:23,701 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 [2022-03-03 19:51:23,701 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash -168495444, now seen corresponding path program 18 times [2022-03-03 19:51:23,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:23,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802127407] [2022-03-03 19:51:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:23,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:23,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:23,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802127407] [2022-03-03 19:51:23,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802127407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:23,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540100613] [2022-03-03 19:51:23,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:51:23,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:23,960 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:23,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:51:24,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:51:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:51:24,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:24,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:24,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:51:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:24,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:24,593 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:51:24,593 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 [2022-03-03 19:51:24,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:24,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:24,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:24,727 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 [2022-03-03 19:51:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:24,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540100613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:24,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:24,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-03 19:51:24,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252559161] [2022-03-03 19:51:24,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:24,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:51:24,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:24,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:51:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:51:24,914 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) [2022-03-03 19:51:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:31,735 INFO L93 Difference]: Finished difference Result 14476 states and 46100 transitions. [2022-03-03 19:51:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-03 19:51:31,735 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 [2022-03-03 19:51:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:31,765 INFO L225 Difference]: With dead ends: 14476 [2022-03-03 19:51:31,765 INFO L226 Difference]: Without dead ends: 14343 [2022-03-03 19:51:31,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1887, Invalid=16473, Unknown=0, NotChecked=0, Total=18360 [2022-03-03 19:51:31,766 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 902 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:31,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1235 Invalid, 4562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3929 Invalid, 0 Unknown, 437 Unchecked, 1.6s Time] [2022-03-03 19:51:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2022-03-03 19:51:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 7848. [2022-03-03 19:51:31,937 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) [2022-03-03 19:51:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 27303 transitions. [2022-03-03 19:51:31,956 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 27303 transitions. Word has length 30 [2022-03-03 19:51:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:31,956 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 27303 transitions. [2022-03-03 19:51:31,956 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) [2022-03-03 19:51:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 27303 transitions. [2022-03-03 19:51:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:31,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:31,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:31,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:32,183 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 [2022-03-03 19:51:32,183 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash -815268852, now seen corresponding path program 19 times [2022-03-03 19:51:32,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:32,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862245884] [2022-03-03 19:51:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:32,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:32,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862245884] [2022-03-03 19:51:32,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862245884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:32,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284359596] [2022-03-03 19:51:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:32,446 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:32,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:51:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,658 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 [2022-03-03 19:51:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:32,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:32,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:51:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:33,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:33,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:33,156 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 [2022-03-03 19:51:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:33,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284359596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:33,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:33,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:51:33,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101794226] [2022-03-03 19:51:33,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:33,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:33,358 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) [2022-03-03 19:51:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:38,095 INFO L93 Difference]: Finished difference Result 12337 states and 39312 transitions. [2022-03-03 19:51:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 19:51:38,096 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 [2022-03-03 19:51:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:38,120 INFO L225 Difference]: With dead ends: 12337 [2022-03-03 19:51:38,121 INFO L226 Difference]: Without dead ends: 12292 [2022-03-03 19:51:38,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4815 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1642, Invalid=11930, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 19:51:38,122 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 855 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:38,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 716 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:51:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12292 states. [2022-03-03 19:51:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12292 to 7843. [2022-03-03 19:51:38,269 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) [2022-03-03 19:51:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7843 states to 7843 states and 27287 transitions. [2022-03-03 19:51:38,287 INFO L78 Accepts]: Start accepts. Automaton has 7843 states and 27287 transitions. Word has length 30 [2022-03-03 19:51:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 7843 states and 27287 transitions. [2022-03-03 19:51:38,287 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) [2022-03-03 19:51:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 7843 states and 27287 transitions. [2022-03-03 19:51:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:38,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:38,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:38,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:38,513 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 [2022-03-03 19:51:38,514 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1901164380, now seen corresponding path program 20 times [2022-03-03 19:51:38,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:38,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719558730] [2022-03-03 19:51:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:38,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:38,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:38,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719558730] [2022-03-03 19:51:38,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719558730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:38,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910441630] [2022-03-03 19:51:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:38,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:38,721 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:38,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:51:38,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:51:38,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:38,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:38,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:38,926 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 [2022-03-03 19:51:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:38,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:39,183 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:51:39,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:51:39,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:39,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:39,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 19:51:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:39,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910441630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:39,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:39,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-03 19:51:39,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808249580] [2022-03-03 19:51:39,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:39,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:39,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:39,382 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) [2022-03-03 19:51:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:44,704 INFO L93 Difference]: Finished difference Result 14596 states and 46967 transitions. [2022-03-03 19:51:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-03 19:51:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:51:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:44,736 INFO L225 Difference]: With dead ends: 14596 [2022-03-03 19:51:44,737 INFO L226 Difference]: Without dead ends: 14492 [2022-03-03 19:51:44,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6252 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1633, Invalid=16727, Unknown=0, NotChecked=0, Total=18360 [2022-03-03 19:51:44,738 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 844 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:44,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1076 Invalid, 4964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3827 Invalid, 0 Unknown, 966 Unchecked, 1.4s Time] [2022-03-03 19:51:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14492 states. [2022-03-03 19:51:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14492 to 7858. [2022-03-03 19:51:44,915 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) [2022-03-03 19:51:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 27334 transitions. [2022-03-03 19:51:44,935 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 27334 transitions. Word has length 30 [2022-03-03 19:51:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 27334 transitions. [2022-03-03 19:51:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 27334 transitions. [2022-03-03 19:51:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:44,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:44,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:44,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:51:45,151 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 [2022-03-03 19:51:45,151 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1211295284, now seen corresponding path program 21 times [2022-03-03 19:51:45,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:45,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489618151] [2022-03-03 19:51:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:45,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:45,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489618151] [2022-03-03 19:51:45,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489618151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:45,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210289195] [2022-03-03 19:51:45,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:45,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:45,392 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:45,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:51:45,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:51:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:51:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:45,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:45,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:45,688 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 [2022-03-03 19:51:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:45,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:46,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:46,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:46,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:51:46,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:46,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:46,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:46,200 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 [2022-03-03 19:51:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:46,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210289195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:46,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:46,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:51:46,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631151575] [2022-03-03 19:51:46,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:46,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:51:46,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:51:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:51:46,328 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) [2022-03-03 19:51:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:53,484 INFO L93 Difference]: Finished difference Result 13827 states and 44982 transitions. [2022-03-03 19:51:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 19:51:53,485 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 [2022-03-03 19:51:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:53,516 INFO L225 Difference]: With dead ends: 13827 [2022-03-03 19:51:53,516 INFO L226 Difference]: Without dead ends: 13797 [2022-03-03 19:51:53,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2214, Invalid=18092, Unknown=0, NotChecked=0, Total=20306 [2022-03-03 19:51:53,518 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 623 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:53,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 948 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:51:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-03-03 19:51:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 7859. [2022-03-03 19:51:53,701 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) [2022-03-03 19:51:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-03 19:51:53,720 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-03 19:51:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-03 19:51:53,720 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) [2022-03-03 19:51:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-03 19:51:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:53,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:53,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:53,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:53,947 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 [2022-03-03 19:51:53,948 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:51:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527216, now seen corresponding path program 22 times [2022-03-03 19:51:53,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:53,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827081236] [2022-03-03 19:51:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:54,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:54,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827081236] [2022-03-03 19:51:54,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827081236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:54,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472830652] [2022-03-03 19:51:54,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:51:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:54,220 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:54,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:51:54,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:51:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:54,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:51:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:54,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:54,424 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 [2022-03-03 19:51:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:54,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:54,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:51:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:54,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:54,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:54,805 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 [2022-03-03 19:51:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:54,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472830652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:54,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:54,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:51:54,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436415105] [2022-03-03 19:51:54,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:54,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:54,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:54,978 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) [2022-03-03 19:52:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:03,717 INFO L93 Difference]: Finished difference Result 14735 states and 47614 transitions. [2022-03-03 19:52:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-03 19:52:03,718 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 [2022-03-03 19:52:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:03,752 INFO L225 Difference]: With dead ends: 14735 [2022-03-03 19:52:03,752 INFO L226 Difference]: Without dead ends: 14660 [2022-03-03 19:52:03,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12048 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3411, Invalid=27741, Unknown=0, NotChecked=0, Total=31152 [2022-03-03 19:52:03,754 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 759 mSDsluCounter, 2588 mSDsCounter, 0 mSdLazyCounter, 5762 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:03,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1546 Invalid, 6537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5762 Invalid, 0 Unknown, 524 Unchecked, 2.1s Time] [2022-03-03 19:52:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14660 states. [2022-03-03 19:52:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14660 to 7859. [2022-03-03 19:52:03,958 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) [2022-03-03 19:52:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 27338 transitions. [2022-03-03 19:52:03,978 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 27338 transitions. Word has length 30 [2022-03-03 19:52:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:03,978 INFO L470 AbstractCegarLoop]: Abstraction has 7859 states and 27338 transitions. [2022-03-03 19:52:03,978 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) [2022-03-03 19:52:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 27338 transitions. [2022-03-03 19:52:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:03,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:03,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:04,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 19:52:04,206 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 [2022-03-03 19:52:04,206 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1359410238, now seen corresponding path program 23 times [2022-03-03 19:52:04,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:04,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956746613] [2022-03-03 19:52:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:04,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:04,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:04,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956746613] [2022-03-03 19:52:04,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956746613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:04,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9433990] [2022-03-03 19:52:04,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:04,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:04,457 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:04,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:52:04,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:52:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:52:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:04,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:04,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:04,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:52:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:04,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:04,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:04,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-03 19:52:05,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:05,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:05,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:05,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9433990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:05,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:05,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-03 19:52:05,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293184245] [2022-03-03 19:52:05,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:52:05,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:05,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:52:05,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:52:05,200 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) [2022-03-03 19:52:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:09,383 INFO L93 Difference]: Finished difference Result 12864 states and 41779 transitions. [2022-03-03 19:52:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-03 19:52:09,384 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 [2022-03-03 19:52:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:09,412 INFO L225 Difference]: With dead ends: 12864 [2022-03-03 19:52:09,412 INFO L226 Difference]: Without dead ends: 12834 [2022-03-03 19:52:09,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3794 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1478, Invalid=9864, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:52:09,413 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 647 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:09,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 567 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:52:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12834 states. [2022-03-03 19:52:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12834 to 7861. [2022-03-03 19:52:09,582 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) [2022-03-03 19:52:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 27345 transitions. [2022-03-03 19:52:09,601 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 27345 transitions. Word has length 30 [2022-03-03 19:52:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:09,601 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 27345 transitions. [2022-03-03 19:52:09,601 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) [2022-03-03 19:52:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 27345 transitions. [2022-03-03 19:52:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:09,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:09,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:09,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:09,828 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 [2022-03-03 19:52:09,829 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:09,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1324381350, now seen corresponding path program 24 times [2022-03-03 19:52:09,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:09,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44303412] [2022-03-03 19:52:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:10,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:10,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44303412] [2022-03-03 19:52:10,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44303412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:10,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799707743] [2022-03-03 19:52:10,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:10,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:10,069 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:10,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:52:10,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:52:10,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:10,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:10,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:10,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:10,313 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 [2022-03-03 19:52:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:10,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:10,723 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:52:10,723 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 [2022-03-03 19:52:10,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:10,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:10,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:10,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:11,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799707743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:11,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:11,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-03 19:52:11,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947432719] [2022-03-03 19:52:11,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:11,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:52:11,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:52:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:52:11,072 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) [2022-03-03 19:52:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:17,402 INFO L93 Difference]: Finished difference Result 13877 states and 45561 transitions. [2022-03-03 19:52:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-03 19:52:17,403 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 [2022-03-03 19:52:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:17,432 INFO L225 Difference]: With dead ends: 13877 [2022-03-03 19:52:17,432 INFO L226 Difference]: Without dead ends: 13845 [2022-03-03 19:52:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1637, Invalid=14113, Unknown=0, NotChecked=0, Total=15750 [2022-03-03 19:52:17,433 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 643 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:17,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 982 Invalid, 4615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3974 Invalid, 0 Unknown, 458 Unchecked, 1.4s Time] [2022-03-03 19:52:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-03-03 19:52:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 7898. [2022-03-03 19:52:17,602 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) [2022-03-03 19:52:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 27478 transitions. [2022-03-03 19:52:17,621 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 27478 transitions. Word has length 30 [2022-03-03 19:52:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:17,621 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 27478 transitions. [2022-03-03 19:52:17,621 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) [2022-03-03 19:52:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 27478 transitions. [2022-03-03 19:52:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:17,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:17,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:17,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 19:52:17,847 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 [2022-03-03 19:52:17,847 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash -511893078, now seen corresponding path program 25 times [2022-03-03 19:52:17,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:17,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222195755] [2022-03-03 19:52:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:17,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:18,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222195755] [2022-03-03 19:52:18,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222195755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:18,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318547596] [2022-03-03 19:52:18,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:18,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:18,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:18,086 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:18,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:52:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:18,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:52:18,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:18,328 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 [2022-03-03 19:52:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:18,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:18,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-03 19:52:18,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:18,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:18,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:18,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318547596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:18,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:18,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:52:18,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634923123] [2022-03-03 19:52:18,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:18,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:52:18,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:52:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:52:18,928 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) [2022-03-03 19:52:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:26,089 INFO L93 Difference]: Finished difference Result 13318 states and 43304 transitions. [2022-03-03 19:52:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-03 19:52:26,089 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 [2022-03-03 19:52:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:26,121 INFO L225 Difference]: With dead ends: 13318 [2022-03-03 19:52:26,121 INFO L226 Difference]: Without dead ends: 13296 [2022-03-03 19:52:26,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2084, Invalid=14428, Unknown=0, NotChecked=0, Total=16512 [2022-03-03 19:52:26,122 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 791 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:26,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 720 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:52:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13296 states. [2022-03-03 19:52:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13296 to 7899. [2022-03-03 19:52:26,299 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) [2022-03-03 19:52:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 27482 transitions. [2022-03-03 19:52:26,319 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 27482 transitions. Word has length 30 [2022-03-03 19:52:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:26,320 INFO L470 AbstractCegarLoop]: Abstraction has 7899 states and 27482 transitions. [2022-03-03 19:52:26,320 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) [2022-03-03 19:52:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 27482 transitions. [2022-03-03 19:52:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:26,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:26,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:26,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:26,541 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 [2022-03-03 19:52:26,541 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash 456149418, now seen corresponding path program 26 times [2022-03-03 19:52:26,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:26,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971882549] [2022-03-03 19:52:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:26,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:26,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:26,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971882549] [2022-03-03 19:52:26,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971882549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:26,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949561222] [2022-03-03 19:52:26,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:26,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:26,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:26,835 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:26,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:52:26,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:52:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,166 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 [2022-03-03 19:52:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:27,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:27,717 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:52:27,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:27,864 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 [2022-03-03 19:52:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:28,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949561222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:28,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:28,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-03 19:52:28,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350221721] [2022-03-03 19:52:28,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:28,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:52:28,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:52:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:52:28,043 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) [2022-03-03 19:52:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:41,181 INFO L93 Difference]: Finished difference Result 16236 states and 52944 transitions. [2022-03-03 19:52:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-03-03 19:52:41,181 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 [2022-03-03 19:52:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:41,215 INFO L225 Difference]: With dead ends: 16236 [2022-03-03 19:52:41,215 INFO L226 Difference]: Without dead ends: 16184 [2022-03-03 19:52:41,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18212 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=6022, Invalid=38710, Unknown=0, NotChecked=0, Total=44732 [2022-03-03 19:52:41,218 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1103 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:41,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 966 Invalid, 6773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 4879 Invalid, 0 Unknown, 1427 Unchecked, 2.0s Time] [2022-03-03 19:52:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-03-03 19:52:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 7938. [2022-03-03 19:52:41,404 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) [2022-03-03 19:52:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 27647 transitions. [2022-03-03 19:52:41,423 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 27647 transitions. Word has length 30 [2022-03-03 19:52:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:41,423 INFO L470 AbstractCegarLoop]: Abstraction has 7938 states and 27647 transitions. [2022-03-03 19:52:41,423 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) [2022-03-03 19:52:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 27647 transitions. [2022-03-03 19:52:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:41,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:41,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:41,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 19:52:41,699 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 [2022-03-03 19:52:41,699 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -801041019, now seen corresponding path program 22 times [2022-03-03 19:52:41,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:41,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363470661] [2022-03-03 19:52:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:41,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:42,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363470661] [2022-03-03 19:52:42,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363470661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:42,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492438335] [2022-03-03 19:52:42,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:42,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:42,007 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:42,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:52:42,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:42,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-03-03 19:52:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:42,486 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:42,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:42,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:42,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:42,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492438335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:42,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:42,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-03 19:52:42,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532983509] [2022-03-03 19:52:42,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:42,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:52:42,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:42,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:52:42,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:52:42,573 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) [2022-03-03 19:52:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:48,718 INFO L93 Difference]: Finished difference Result 16154 states and 53648 transitions. [2022-03-03 19:52:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 19:52:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:48,757 INFO L225 Difference]: With dead ends: 16154 [2022-03-03 19:52:48,757 INFO L226 Difference]: Without dead ends: 16107 [2022-03-03 19:52:48,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2594, Invalid=13918, Unknown=0, NotChecked=0, Total=16512 [2022-03-03 19:52:48,759 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 865 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:48,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 783 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:52:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16107 states. [2022-03-03 19:52:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16107 to 7951. [2022-03-03 19:52:48,995 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) [2022-03-03 19:52:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 27677 transitions. [2022-03-03 19:52:49,017 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 27677 transitions. Word has length 30 [2022-03-03 19:52:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:49,017 INFO L470 AbstractCegarLoop]: Abstraction has 7951 states and 27677 transitions. [2022-03-03 19:52:49,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 27677 transitions. [2022-03-03 19:52:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:49,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:49,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:49,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-03 19:52:49,246 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 [2022-03-03 19:52:49,247 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:52:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash -312520331, now seen corresponding path program 23 times [2022-03-03 19:52:49,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:49,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087400395] [2022-03-03 19:52:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:49,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:49,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087400395] [2022-03-03 19:52:49,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087400395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:49,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819511631] [2022-03-03 19:52:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:49,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:49,550 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:49,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:52:49,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:52:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:52:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:49,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:49,888 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 [2022-03-03 19:52:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:49,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:50,202 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:52:50,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:52:50,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:50,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:50,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:52:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:50,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819511631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:50,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:50,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-03 19:52:50,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723462751] [2022-03-03 19:52:50,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:50,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:52:50,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:50,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:52:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:52:50,323 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) [2022-03-03 19:53:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:09,464 INFO L93 Difference]: Finished difference Result 20702 states and 67784 transitions. [2022-03-03 19:53:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-03-03 19:53:09,464 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:09,511 INFO L225 Difference]: With dead ends: 20702 [2022-03-03 19:53:09,511 INFO L226 Difference]: Without dead ends: 20654 [2022-03-03 19:53:09,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41453 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=9257, Invalid=85915, Unknown=0, NotChecked=0, Total=95172 [2022-03-03 19:53:09,516 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1124 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 5521 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:09,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1159 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 5521 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-03 19:53:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20654 states. [2022-03-03 19:53:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20654 to 7972. [2022-03-03 19:53:09,816 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) [2022-03-03 19:53:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7972 states to 7972 states and 27761 transitions. [2022-03-03 19:53:09,835 INFO L78 Accepts]: Start accepts. Automaton has 7972 states and 27761 transitions. Word has length 30 [2022-03-03 19:53:09,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:09,835 INFO L470 AbstractCegarLoop]: Abstraction has 7972 states and 27761 transitions. [2022-03-03 19:53:09,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:09,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7972 states and 27761 transitions. [2022-03-03 19:53:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:09,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:09,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:09,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 19:53:10,063 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 [2022-03-03 19:53:10,063 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -53764609, now seen corresponding path program 24 times [2022-03-03 19:53:10,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:10,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6253621] [2022-03-03 19:53:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:10,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:10,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6253621] [2022-03-03 19:53:10,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6253621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:10,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16135409] [2022-03-03 19:53:10,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:10,545 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) [2022-03-03 19:53:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:53:10,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:53:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:53:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:11,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:11,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:11,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:53:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:11,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:11,401 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:11,401 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 [2022-03-03 19:53:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:11,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:11,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:53:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:11,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16135409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:11,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:11,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-03-03 19:53:11,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522936809] [2022-03-03 19:53:11,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:53:11,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:53:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:53:11,545 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) [2022-03-03 19:53:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:20,109 INFO L93 Difference]: Finished difference Result 16143 states and 53625 transitions. [2022-03-03 19:53:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-03 19:53:20,110 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 [2022-03-03 19:53:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:20,145 INFO L225 Difference]: With dead ends: 16143 [2022-03-03 19:53:20,145 INFO L226 Difference]: Without dead ends: 16096 [2022-03-03 19:53:20,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9478 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3565, Invalid=20927, Unknown=0, NotChecked=0, Total=24492 [2022-03-03 19:53:20,148 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 899 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 4379 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:20,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 887 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 4379 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-03 19:53:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16096 states. [2022-03-03 19:53:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16096 to 7981. [2022-03-03 19:53:20,331 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) [2022-03-03 19:53:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 27807 transitions. [2022-03-03 19:53:20,351 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 27807 transitions. Word has length 30 [2022-03-03 19:53:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:20,351 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 27807 transitions. [2022-03-03 19:53:20,351 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) [2022-03-03 19:53:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 27807 transitions. [2022-03-03 19:53:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:20,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:20,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:20,602 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 [2022-03-03 19:53:20,603 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:20,603 INFO L85 PathProgramCache]: Analyzing trace with hash 740544464, now seen corresponding path program 27 times [2022-03-03 19:53:20,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:20,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10316745] [2022-03-03 19:53:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:20,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:20,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:20,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10316745] [2022-03-03 19:53:20,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10316745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:20,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627061683] [2022-03-03 19:53:20,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:20,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:20,907 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) [2022-03-03 19:53:20,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:53:20,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:53:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:53:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:21,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:21,284 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 [2022-03-03 19:53:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:21,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:21,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:21,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:53:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:22,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627061683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:22,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:22,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:53:22,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281832369] [2022-03-03 19:53:22,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:22,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:53:22,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:53:22,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:22,157 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) [2022-03-03 19:53:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:26,466 INFO L93 Difference]: Finished difference Result 12813 states and 40793 transitions. [2022-03-03 19:53:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-03 19:53:26,466 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 [2022-03-03 19:53:26,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:26,493 INFO L225 Difference]: With dead ends: 12813 [2022-03-03 19:53:26,493 INFO L226 Difference]: Without dead ends: 12791 [2022-03-03 19:53:26,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1705, Invalid=14297, Unknown=0, NotChecked=0, Total=16002 [2022-03-03 19:53:26,494 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 621 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:26,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 813 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2495 Invalid, 0 Unknown, 1245 Unchecked, 1.0s Time] [2022-03-03 19:53:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2022-03-03 19:53:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 7977. [2022-03-03 19:53:26,656 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) [2022-03-03 19:53:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7977 states to 7977 states and 27794 transitions. [2022-03-03 19:53:26,674 INFO L78 Accepts]: Start accepts. Automaton has 7977 states and 27794 transitions. Word has length 30 [2022-03-03 19:53:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:26,675 INFO L470 AbstractCegarLoop]: Abstraction has 7977 states and 27794 transitions. [2022-03-03 19:53:26,675 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) [2022-03-03 19:53:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7977 states and 27794 transitions. [2022-03-03 19:53:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:26,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:26,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:26,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:26,899 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 [2022-03-03 19:53:26,899 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash 193579860, now seen corresponding path program 28 times [2022-03-03 19:53:26,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:26,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553904063] [2022-03-03 19:53:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:27,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:27,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553904063] [2022-03-03 19:53:27,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553904063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:27,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567654418] [2022-03-03 19:53:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:53:27,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:27,161 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) [2022-03-03 19:53:27,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:53:27,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:53:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:53:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:27,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,466 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 [2022-03-03 19:53:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:27,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:27,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:27,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:53:27,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:27,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:27,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:53:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:27,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567654418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:27,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:27,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:53:27,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231401398] [2022-03-03 19:53:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:27,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:53:27,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:27,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:53:27,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:53:27,995 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) [2022-03-03 19:53:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:34,486 INFO L93 Difference]: Finished difference Result 13886 states and 45259 transitions. [2022-03-03 19:53:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-03 19:53:34,487 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 [2022-03-03 19:53:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:34,523 INFO L225 Difference]: With dead ends: 13886 [2022-03-03 19:53:34,523 INFO L226 Difference]: Without dead ends: 13864 [2022-03-03 19:53:34,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7603 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2247, Invalid=18923, Unknown=0, NotChecked=0, Total=21170 [2022-03-03 19:53:34,525 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 588 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:34,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 849 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:53:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2022-03-03 19:53:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 7979. [2022-03-03 19:53:34,749 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) [2022-03-03 19:53:34,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7979 states to 7979 states and 27801 transitions. [2022-03-03 19:53:34,836 INFO L78 Accepts]: Start accepts. Automaton has 7979 states and 27801 transitions. Word has length 30 [2022-03-03 19:53:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:34,836 INFO L470 AbstractCegarLoop]: Abstraction has 7979 states and 27801 transitions. [2022-03-03 19:53:34,836 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) [2022-03-03 19:53:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7979 states and 27801 transitions. [2022-03-03 19:53:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:34,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:34,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:34,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:35,063 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 [2022-03-03 19:53:35,063 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1161622356, now seen corresponding path program 29 times [2022-03-03 19:53:35,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:35,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626265710] [2022-03-03 19:53:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:35,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:35,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626265710] [2022-03-03 19:53:35,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626265710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:35,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512611873] [2022-03-03 19:53:35,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:53:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:35,319 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) [2022-03-03 19:53:35,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:53:35,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:53:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:53:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:35,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:35,610 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 [2022-03-03 19:53:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:35,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:35,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:35,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-03-03 19:53:36,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:36,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:36,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:53:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:36,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512611873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:36,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:36,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-03 19:53:36,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485781880] [2022-03-03 19:53:36,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:36,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:53:36,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:53:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:53:36,141 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) [2022-03-03 19:53:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:47,177 INFO L93 Difference]: Finished difference Result 15043 states and 48614 transitions. [2022-03-03 19:53:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-03-03 19:53:47,178 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 [2022-03-03 19:53:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:47,211 INFO L225 Difference]: With dead ends: 15043 [2022-03-03 19:53:47,211 INFO L226 Difference]: Without dead ends: 15014 [2022-03-03 19:53:47,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15351 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3955, Invalid=35447, Unknown=0, NotChecked=0, Total=39402 [2022-03-03 19:53:47,214 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 688 mSDsluCounter, 2017 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:47,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1211 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-03 19:53:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15014 states. [2022-03-03 19:53:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15014 to 7976. [2022-03-03 19:53:47,414 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) [2022-03-03 19:53:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 27788 transitions. [2022-03-03 19:53:47,433 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 27788 transitions. Word has length 30 [2022-03-03 19:53:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:47,434 INFO L470 AbstractCegarLoop]: Abstraction has 7976 states and 27788 transitions. [2022-03-03 19:53:47,434 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) [2022-03-03 19:53:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 27788 transitions. [2022-03-03 19:53:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:47,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:47,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:47,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-03 19:53:47,653 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 [2022-03-03 19:53:47,653 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:53:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1258533564, now seen corresponding path program 30 times [2022-03-03 19:53:47,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:47,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897236653] [2022-03-03 19:53:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:47,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:47,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897236653] [2022-03-03 19:53:47,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897236653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:47,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934810361] [2022-03-03 19:53:47,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:53:47,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:47,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:47,961 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) [2022-03-03 19:53:47,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:53:47,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:53:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:47,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:53:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:48,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:48,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-03-03 19:53:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:48,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:49,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:49,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:49,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:49,028 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 [2022-03-03 19:53:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:49,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-03 19:53:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:49,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934810361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:49,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:49,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-03 19:53:49,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116827613] [2022-03-03 19:53:49,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:49,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:53:49,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:49,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:53:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:49,186 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) [2022-03-03 19:54:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:04,247 INFO L93 Difference]: Finished difference Result 15939 states and 52512 transitions. [2022-03-03 19:54:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-03 19:54:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:04,281 INFO L225 Difference]: With dead ends: 15939 [2022-03-03 19:54:04,281 INFO L226 Difference]: Without dead ends: 15826 [2022-03-03 19:54:04,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19742 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=5763, Invalid=43743, Unknown=0, NotChecked=0, Total=49506 [2022-03-03 19:54:04,283 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1204 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1171 Invalid, 7247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 4737 Invalid, 0 Unknown, 2076 Unchecked, 2.3s Time] [2022-03-03 19:54:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15826 states. [2022-03-03 19:54:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15826 to 8034. [2022-03-03 19:54:04,454 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) [2022-03-03 19:54:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 28014 transitions. [2022-03-03 19:54:04,473 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 28014 transitions. Word has length 30 [2022-03-03 19:54:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:04,473 INFO L470 AbstractCegarLoop]: Abstraction has 8034 states and 28014 transitions. [2022-03-03 19:54:04,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 28014 transitions. [2022-03-03 19:54:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:04,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:04,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:04,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:04,693 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 [2022-03-03 19:54:04,693 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -553862034, now seen corresponding path program 31 times [2022-03-03 19:54:04,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:04,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144107968] [2022-03-03 19:54:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:05,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144107968] [2022-03-03 19:54:05,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144107968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:05,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922767057] [2022-03-03 19:54:05,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:05,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:05,020 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) [2022-03-03 19:54:05,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:54:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:05,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:05,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:05,191 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 [2022-03-03 19:54:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:05,535 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:05,536 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 [2022-03-03 19:54:05,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:05,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:05,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:05,714 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 [2022-03-03 19:54:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922767057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:05,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:05,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-03 19:54:05,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002158076] [2022-03-03 19:54:05,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:05,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:05,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:05,917 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) [2022-03-03 19:54:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:09,464 INFO L93 Difference]: Finished difference Result 14061 states and 46525 transitions. [2022-03-03 19:54:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:54:09,464 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 [2022-03-03 19:54:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:09,498 INFO L225 Difference]: With dead ends: 14061 [2022-03-03 19:54:09,498 INFO L226 Difference]: Without dead ends: 14020 [2022-03-03 19:54:09,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=810, Invalid=6846, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:54:09,499 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 499 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:09,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 777 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 517 Unchecked, 1.3s Time] [2022-03-03 19:54:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14020 states. [2022-03-03 19:54:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14020 to 8023. [2022-03-03 19:54:09,701 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) [2022-03-03 19:54:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8023 states to 8023 states and 27970 transitions. [2022-03-03 19:54:09,722 INFO L78 Accepts]: Start accepts. Automaton has 8023 states and 27970 transitions. Word has length 30 [2022-03-03 19:54:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:09,722 INFO L470 AbstractCegarLoop]: Abstraction has 8023 states and 27970 transitions. [2022-03-03 19:54:09,722 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) [2022-03-03 19:54:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8023 states and 27970 transitions. [2022-03-03 19:54:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:09,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:09,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:09,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:09,965 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 [2022-03-03 19:54:09,965 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2072629490, now seen corresponding path program 32 times [2022-03-03 19:54:09,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:09,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711832053] [2022-03-03 19:54:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:09,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:10,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:10,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711832053] [2022-03-03 19:54:10,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711832053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:10,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619111789] [2022-03-03 19:54:10,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:10,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:10,213 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) [2022-03-03 19:54:10,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:54:10,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:10,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:10,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:10,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:54:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:10,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:11,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:11,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:11,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:11,121 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 [2022-03-03 19:54:11,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:11,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:54:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:11,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619111789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:11,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:11,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-03-03 19:54:11,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172414573] [2022-03-03 19:54:11,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:11,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:54:11,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:54:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:54:11,221 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) [2022-03-03 19:54:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:24,446 INFO L93 Difference]: Finished difference Result 16255 states and 54161 transitions. [2022-03-03 19:54:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-03 19:54:24,446 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 [2022-03-03 19:54:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:24,486 INFO L225 Difference]: With dead ends: 16255 [2022-03-03 19:54:24,486 INFO L226 Difference]: Without dead ends: 16202 [2022-03-03 19:54:24,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17497 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=4968, Invalid=40188, Unknown=0, NotChecked=0, Total=45156 [2022-03-03 19:54:24,488 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1035 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:24,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1056 Invalid, 7514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 4579 Invalid, 0 Unknown, 2533 Unchecked, 2.1s Time] [2022-03-03 19:54:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2022-03-03 19:54:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 8006. [2022-03-03 19:54:24,688 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) [2022-03-03 19:54:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 27897 transitions. [2022-03-03 19:54:24,708 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 27897 transitions. Word has length 30 [2022-03-03 19:54:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:24,708 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 27897 transitions. [2022-03-03 19:54:24,708 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) [2022-03-03 19:54:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 27897 transitions. [2022-03-03 19:54:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:24,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:24,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:24,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:24,936 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 [2022-03-03 19:54:24,936 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash -638630994, now seen corresponding path program 33 times [2022-03-03 19:54:24,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:24,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890185178] [2022-03-03 19:54:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:25,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:25,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890185178] [2022-03-03 19:54:25,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890185178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:25,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54728613] [2022-03-03 19:54:25,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:25,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:25,224 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) [2022-03-03 19:54:25,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 19:54:25,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:54:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:25,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:25,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:25,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:25,534 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 [2022-03-03 19:54:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:26,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:26,098 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 [2022-03-03 19:54:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:26,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54728613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:26,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:26,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-03 19:54:26,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729054773] [2022-03-03 19:54:26,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:26,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:26,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:26,754 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) [2022-03-03 19:54:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:31,030 INFO L93 Difference]: Finished difference Result 13775 states and 45224 transitions. [2022-03-03 19:54:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:54:31,030 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 [2022-03-03 19:54:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:31,062 INFO L225 Difference]: With dead ends: 13775 [2022-03-03 19:54:31,062 INFO L226 Difference]: Without dead ends: 13768 [2022-03-03 19:54:31,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4252 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1425, Invalid=10347, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:54:31,064 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:31,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 705 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2859 Invalid, 0 Unknown, 722 Unchecked, 1.2s Time] [2022-03-03 19:54:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13768 states. [2022-03-03 19:54:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13768 to 8005. [2022-03-03 19:54:31,264 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) [2022-03-03 19:54:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 27893 transitions. [2022-03-03 19:54:31,283 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 27893 transitions. Word has length 30 [2022-03-03 19:54:31,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:31,283 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 27893 transitions. [2022-03-03 19:54:31,283 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) [2022-03-03 19:54:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 27893 transitions. [2022-03-03 19:54:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:31,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:31,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:31,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:31,511 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 [2022-03-03 19:54:31,511 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 459794410, now seen corresponding path program 34 times [2022-03-03 19:54:31,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:31,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105383355] [2022-03-03 19:54:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:31,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:31,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105383355] [2022-03-03 19:54:31,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105383355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:31,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273417220] [2022-03-03 19:54:31,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:31,824 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) [2022-03-03 19:54:31,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 19:54:31,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:31,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:54:31,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:32,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:32,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:32,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,095 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 [2022-03-03 19:54:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:32,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:54:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:32,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:32,632 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 [2022-03-03 19:54:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:32,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273417220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:32,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:32,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-03 19:54:32,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149787534] [2022-03-03 19:54:32,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:32,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:32,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:32,761 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) [2022-03-03 19:54:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:36,828 INFO L93 Difference]: Finished difference Result 13077 states and 42731 transitions. [2022-03-03 19:54:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:54:36,828 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 [2022-03-03 19:54:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:36,857 INFO L225 Difference]: With dead ends: 13077 [2022-03-03 19:54:36,857 INFO L226 Difference]: Without dead ends: 13040 [2022-03-03 19:54:36,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1218, Invalid=8288, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:54:36,858 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 449 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2836 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:36,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 715 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2836 Invalid, 0 Unknown, 449 Unchecked, 1.1s Time] [2022-03-03 19:54:36,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13040 states. [2022-03-03 19:54:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13040 to 8004. [2022-03-03 19:54:37,018 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) [2022-03-03 19:54:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8004 states to 8004 states and 27890 transitions. [2022-03-03 19:54:37,038 INFO L78 Accepts]: Start accepts. Automaton has 8004 states and 27890 transitions. Word has length 30 [2022-03-03 19:54:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:37,038 INFO L470 AbstractCegarLoop]: Abstraction has 8004 states and 27890 transitions. [2022-03-03 19:54:37,038 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) [2022-03-03 19:54:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8004 states and 27890 transitions. [2022-03-03 19:54:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:37,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:37,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:37,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:37,266 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 [2022-03-03 19:54:37,266 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1354496730, now seen corresponding path program 35 times [2022-03-03 19:54:37,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:37,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971580366] [2022-03-03 19:54:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:37,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:37,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971580366] [2022-03-03 19:54:37,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971580366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:37,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136106741] [2022-03-03 19:54:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:37,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:37,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:37,499 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) [2022-03-03 19:54:37,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 19:54:37,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:54:37,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:37,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:37,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:37,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:37,723 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 [2022-03-03 19:54:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:37,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:37,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:38,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:38,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2022-03-03 19:54:38,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:38,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:38,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:38,172 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 [2022-03-03 19:54:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:38,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136106741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:38,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:38,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-03 19:54:38,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908947204] [2022-03-03 19:54:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:38,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:54:38,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:54:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:38,309 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) [2022-03-03 19:54:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:42,518 INFO L93 Difference]: Finished difference Result 12790 states and 41775 transitions. [2022-03-03 19:54:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 19:54:42,518 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 [2022-03-03 19:54:42,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:42,551 INFO L225 Difference]: With dead ends: 12790 [2022-03-03 19:54:42,551 INFO L226 Difference]: Without dead ends: 12783 [2022-03-03 19:54:42,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1075, Invalid=7115, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:54:42,552 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 427 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:42,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 547 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:54:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12783 states. [2022-03-03 19:54:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12783 to 8007. [2022-03-03 19:54:42,764 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) [2022-03-03 19:54:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8007 states to 8007 states and 27901 transitions. [2022-03-03 19:54:42,782 INFO L78 Accepts]: Start accepts. Automaton has 8007 states and 27901 transitions. Word has length 30 [2022-03-03 19:54:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:42,782 INFO L470 AbstractCegarLoop]: Abstraction has 8007 states and 27901 transitions. [2022-03-03 19:54:42,782 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) [2022-03-03 19:54:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 8007 states and 27901 transitions. [2022-03-03 19:54:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:42,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:42,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:42,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:43,006 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 [2022-03-03 19:54:43,007 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:43,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1285608810, now seen corresponding path program 36 times [2022-03-03 19:54:43,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:43,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217600231] [2022-03-03 19:54:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:43,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:43,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217600231] [2022-03-03 19:54:43,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217600231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:43,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587901482] [2022-03-03 19:54:43,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:43,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:43,246 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) [2022-03-03 19:54:43,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 19:54:43,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:54:43,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:54:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:43,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:43,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:54:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:43,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:43,720 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:43,721 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 [2022-03-03 19:54:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:43,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:43,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:43,824 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 [2022-03-03 19:54:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:43,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587901482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:43,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:43,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-03 19:54:43,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279984477] [2022-03-03 19:54:43,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:43,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:54:43,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:54:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:43,933 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) [2022-03-03 19:54:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:48,539 INFO L93 Difference]: Finished difference Result 13667 states and 45204 transitions. [2022-03-03 19:54:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 19:54:48,539 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 [2022-03-03 19:54:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:48,569 INFO L225 Difference]: With dead ends: 13667 [2022-03-03 19:54:48,569 INFO L226 Difference]: Without dead ends: 13630 [2022-03-03 19:54:48,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=942, Invalid=8564, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:54:48,570 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 530 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 888 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 3495 Invalid, 0 Unknown, 372 Unchecked, 1.3s Time] [2022-03-03 19:54:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13630 states. [2022-03-03 19:54:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13630 to 7954. [2022-03-03 19:54:48,763 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) [2022-03-03 19:54:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 27719 transitions. [2022-03-03 19:54:48,783 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 27719 transitions. Word has length 30 [2022-03-03 19:54:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 27719 transitions. [2022-03-03 19:54:48,783 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) [2022-03-03 19:54:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 27719 transitions. [2022-03-03 19:54:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:48,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:48,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:48,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-03 19:54:49,010 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 [2022-03-03 19:54:49,011 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash 788969820, now seen corresponding path program 37 times [2022-03-03 19:54:49,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:49,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704065652] [2022-03-03 19:54:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:49,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:49,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704065652] [2022-03-03 19:54:49,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704065652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:49,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491292690] [2022-03-03 19:54:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:49,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:49,219 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) [2022-03-03 19:54:49,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 19:54:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:54:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:49,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:49,453 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 [2022-03-03 19:54:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:49,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:49,669 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:49,669 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 [2022-03-03 19:54:49,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:49,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:49,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:49,790 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 [2022-03-03 19:54:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:49,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491292690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:49,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:49,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-03 19:54:49,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429014722] [2022-03-03 19:54:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:54:49,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:54:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:49,911 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) [2022-03-03 19:54:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:54,217 INFO L93 Difference]: Finished difference Result 13093 states and 42430 transitions. [2022-03-03 19:54:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:54:54,218 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 [2022-03-03 19:54:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:54,248 INFO L225 Difference]: With dead ends: 13093 [2022-03-03 19:54:54,248 INFO L226 Difference]: Without dead ends: 13048 [2022-03-03 19:54:54,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3492 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1105, Invalid=9607, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:54:54,249 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 554 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3531 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:54,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 858 Invalid, 3715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3531 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:54:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13048 states. [2022-03-03 19:54:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13048 to 7969. [2022-03-03 19:54:54,425 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) [2022-03-03 19:54:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7969 states to 7969 states and 27788 transitions. [2022-03-03 19:54:54,445 INFO L78 Accepts]: Start accepts. Automaton has 7969 states and 27788 transitions. Word has length 30 [2022-03-03 19:54:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:54,445 INFO L470 AbstractCegarLoop]: Abstraction has 7969 states and 27788 transitions. [2022-03-03 19:54:54,445 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) [2022-03-03 19:54:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7969 states and 27788 transitions. [2022-03-03 19:54:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:54,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:54,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:54,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 19:54:54,671 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 [2022-03-03 19:54:54,671 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:54:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2049272556, now seen corresponding path program 38 times [2022-03-03 19:54:54,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:54,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43712464] [2022-03-03 19:54:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:54,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:54,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43712464] [2022-03-03 19:54:54,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43712464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:54,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256764245] [2022-03-03 19:54:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:54,934 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) [2022-03-03 19:54:54,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 19:54:54,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:54:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:55,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:55,145 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 [2022-03-03 19:54:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:55,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:55,414 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:54:55,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-03-03 19:54:55,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:55,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:55,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 19:54:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:55,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256764245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:55,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:55,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-03 19:54:55,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117819105] [2022-03-03 19:54:55,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:55,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:54:55,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:54:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:54:55,691 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) [2022-03-03 19:55:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:01,108 INFO L93 Difference]: Finished difference Result 14336 states and 46397 transitions. [2022-03-03 19:55:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 19:55:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:01,137 INFO L225 Difference]: With dead ends: 14336 [2022-03-03 19:55:01,137 INFO L226 Difference]: Without dead ends: 14232 [2022-03-03 19:55:01,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4328 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1246, Invalid=11636, Unknown=0, NotChecked=0, Total=12882 [2022-03-03 19:55:01,138 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 523 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 4731 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:01,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 1359 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4731 Invalid, 0 Unknown, 317 Unchecked, 1.8s Time] [2022-03-03 19:55:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2022-03-03 19:55:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 7968. [2022-03-03 19:55:01,306 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) [2022-03-03 19:55:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7968 states to 7968 states and 27768 transitions. [2022-03-03 19:55:01,327 INFO L78 Accepts]: Start accepts. Automaton has 7968 states and 27768 transitions. Word has length 30 [2022-03-03 19:55:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:01,327 INFO L470 AbstractCegarLoop]: Abstraction has 7968 states and 27768 transitions. [2022-03-03 19:55:01,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7968 states and 27768 transitions. [2022-03-03 19:55:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:01,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:01,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:01,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-03 19:55:01,555 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 [2022-03-03 19:55:01,555 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:55:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash -368775916, now seen corresponding path program 39 times [2022-03-03 19:55:01,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:01,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130361644] [2022-03-03 19:55:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:01,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:01,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:01,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130361644] [2022-03-03 19:55:01,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130361644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:01,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859483766] [2022-03-03 19:55:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:01,745 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) [2022-03-03 19:55:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 19:55:01,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:55:01,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:55:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:02,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:02,072 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... [2022-03-03 20:03:29,119 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:03:29,121 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 20:03:29,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-03 20:03:29,144 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 [2022-03-03 20:03:29,144 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 [2022-03-03 20:03:29,335 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 [2022-03-03 20:03:29,336 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 9ms.. [2022-03-03 20:03:29,337 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 20:03:29,337 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 20:03:29,337 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 20:03:29,346 INFO L732 BasicCegarLoop]: Path program histogram: [39, 29, 24, 6, 3, 2, 1] [2022-03-03 20:03:29,347 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:03:29,347 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:03:29,348 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:03:29 BasicIcfg [2022-03-03 20:03:29,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:03:29,349 INFO L158 Benchmark]: Toolchain (without parser) took 874308.53ms. Allocated memory was 208.7MB in the beginning and 902.8MB in the end (delta: 694.2MB). Free memory was 170.6MB in the beginning and 235.9MB in the end (delta: -65.3MB). Peak memory consumption was 701.9MB. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 171.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.54ms. Allocated memory is still 208.7MB. Free memory was 170.5MB in the beginning and 169.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L158 Benchmark]: Boogie Preprocessor took 10.71ms. Allocated memory is still 208.7MB. Free memory was 169.0MB in the beginning and 168.1MB in the end (delta: 952.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L158 Benchmark]: RCFGBuilder took 162.80ms. Allocated memory is still 208.7MB. Free memory was 168.0MB in the beginning and 159.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L158 Benchmark]: TraceAbstraction took 874113.29ms. Allocated memory was 208.7MB in the beginning and 902.8MB in the end (delta: 694.2MB). Free memory was 158.6MB in the beginning and 235.9MB in the end (delta: -77.3MB). Peak memory consumption was 689.4MB. Max. memory is 8.0GB. [2022-03-03 20:03:29,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 171.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.54ms. Allocated memory is still 208.7MB. Free memory was 170.5MB in the beginning and 169.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.71ms. Allocated memory is still 208.7MB. Free memory was 169.0MB in the beginning and 168.1MB in the end (delta: 952.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 162.80ms. Allocated memory is still 208.7MB. Free memory was 168.0MB in the beginning and 159.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 874113.29ms. Allocated memory was 208.7MB in the beginning and 902.8MB in the end (delta: 694.2MB). Free memory was 158.6MB in the beginning and 235.9MB in the end (delta: -77.3MB). Peak memory consumption was 689.4MB. 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 9ms.. - 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 9ms.. - 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 9ms.. - 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 9ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 874.1s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.8s, AutomataDifference: 276.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48384 SdHoareTripleChecker+Valid, 67.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48384 mSDsluCounter, 41233 SdHoareTripleChecker+Invalid, 57.8s 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, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11742 GetRequests, 4083 SyntacticMatches, 297 SemanticMatches, 7362 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 340143 ImplicationChecksByTransitivity, 217.6s 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: 11.5s AutomataMinimizationTime, 103 MinimizatonAttempts, 388397 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 53.4s 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