/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/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-09 02:31:35,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-09 02:31:35,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-09 02:31:35,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-09 02:31:35,368 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 [2022-02-09 02:31:35,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-09 02:31:35,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-09 02:31:35,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-09 02:31:35,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-09 02:31:35,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-09 02:31:35,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-09 02:31:35,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * Use SBE=true [2022-02-09 02:31:35,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-09 02:31:35,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-09 02:31:35,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-09 02:31:35,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:31:35,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-09 02:31:35,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-09 02:31:35,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-09 02:31:35,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-09 02:31:35,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-09 02:31:35,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-09 02:31:35,626 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-09 02:31:35,627 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-09 02:31:35,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2022-02-09 02:31:35,628 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2022-02-09 02:31:35,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-09 02:31:35,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-09 02:31:35,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-09 02:31:35,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-09 02:31:35,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-09 02:31:35,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,669 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-09 02:31:35,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-09 02:31:35,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-09 02:31:35,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-09 02:31:35,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-09 02:31:35,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-09 02:31:35,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-09 02:31:35,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-09 02:31:35,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-09 02:31:35,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/1) ... [2022-02-09 02:31:35,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 02:31:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:35,710 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) [2022-02-09 02:31:35,735 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 [2022-02-09 02:31:35,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-09 02:31:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-09 02:31:35,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-09 02:31:35,747 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-09 02:31:35,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-09 02:31:35,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-09 02:31:35,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-09 02:31:35,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-09 02:31:35,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-09 02:31:35,748 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-09 02:31:35,748 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-09 02:31:35,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-09 02:31:35,749 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-09 02:31:35,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-09 02:31:35,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-09 02:31:35,750 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-09 02:31:35,782 INFO L234 CfgBuilder]: Building ICFG [2022-02-09 02:31:35,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-09 02:31:35,888 INFO L275 CfgBuilder]: Performing block encoding [2022-02-09 02:31:35,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-09 02:31:35,896 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-09 02:31:35,897 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:31:35 BoogieIcfgContainer [2022-02-09 02:31:35,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-09 02:31:35,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-09 02:31:35,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-09 02:31:35,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-09 02:31:35,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 02:31:35" (1/2) ... [2022-02-09 02:31:35,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351b8f3c and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.02 02:31:35, skipping insertion in model container [2022-02-09 02:31:35,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 02:31:35" (2/2) ... [2022-02-09 02:31:35,910 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2022-02-09 02:31:35,913 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-09 02:31:35,914 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-09 02:31:35,914 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-09 02:31:35,914 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-09 02:31:35,965 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-02-09 02:31:36,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 02:31:36,046 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 [2022-02-09 02:31:36,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-09 02:31:36,053 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2022-02-09 02:31:36,187 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-09 02:31:36,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:36,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:36,215 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash 287084453, now seen corresponding path program 1 times [2022-02-09 02:31:36,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:36,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673799840] [2022-02-09 02:31:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:36,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:36,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:36,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673799840] [2022-02-09 02:31:36,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673799840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:36,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:36,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-09 02:31:36,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064449790] [2022-02-09 02:31:36,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:36,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-09 02:31:36,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-09 02:31:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-09 02:31:36,388 INFO L87 Difference]: Start difference. First operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:36,520 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2022-02-09 02:31:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-09 02:31:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-09 02:31:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:36,550 INFO L225 Difference]: With dead ends: 1365 [2022-02-09 02:31:36,550 INFO L226 Difference]: Without dead ends: 1334 [2022-02-09 02:31:36,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-09 02:31:36,556 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:36,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 02:31:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-02-09 02:31:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2022-02-09 02:31:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2022-02-09 02:31:36,705 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2022-02-09 02:31:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:36,706 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2022-02-09 02:31:36,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2022-02-09 02:31:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:36,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:36,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:36,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-09 02:31:36,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1903967800, now seen corresponding path program 1 times [2022-02-09 02:31:36,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:36,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241231007] [2022-02-09 02:31:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:36,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:36,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:36,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241231007] [2022-02-09 02:31:36,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241231007] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:36,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125625012] [2022-02-09 02:31:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:36,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:36,763 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) [2022-02-09 02:31:36,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-09 02:31:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-09 02:31:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:36,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:36,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125625012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:36,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:36,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-09 02:31:36,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826286114] [2022-02-09 02:31:36,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:36,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:31:36,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:36,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:31:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:36,974 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:37,074 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2022-02-09 02:31:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:37,088 INFO L225 Difference]: With dead ends: 2313 [2022-02-09 02:31:37,088 INFO L226 Difference]: Without dead ends: 2313 [2022-02-09 02:31:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:37,093 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:37,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 02:31:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-02-09 02:31:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2022-02-09 02:31:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2022-02-09 02:31:37,152 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2022-02-09 02:31:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:37,152 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2022-02-09 02:31:37,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2022-02-09 02:31:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:37,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:37,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:37,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:37,371 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 [2022-02-09 02:31:37,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 403848439, now seen corresponding path program 1 times [2022-02-09 02:31:37,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:37,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990105858] [2022-02-09 02:31:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:37,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:37,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990105858] [2022-02-09 02:31:37,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990105858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:37,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114101416] [2022-02-09 02:31:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:37,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:37,423 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) [2022-02-09 02:31:37,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-09 02:31:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-09 02:31:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:37,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114101416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:37,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:37,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-02-09 02:31:37,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522006754] [2022-02-09 02:31:37,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:37,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-09 02:31:37,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-09 02:31:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-09 02:31:37,556 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:37,653 INFO L93 Difference]: Finished difference Result 2593 states and 10018 transitions. [2022-02-09 02:31:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-09 02:31:37,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:37,668 INFO L225 Difference]: With dead ends: 2593 [2022-02-09 02:31:37,668 INFO L226 Difference]: Without dead ends: 2593 [2022-02-09 02:31:37,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-09 02:31:37,669 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 95 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:37,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 67 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 02:31:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-02-09 02:31:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 1572. [2022-02-09 02:31:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.045830681094844) internal successors, (6356), 1571 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 6356 transitions. [2022-02-09 02:31:37,730 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 6356 transitions. Word has length 22 [2022-02-09 02:31:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:37,730 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 6356 transitions. [2022-02-09 02:31:37,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 6356 transitions. [2022-02-09 02:31:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:37,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:37,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:37,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:37,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-09 02:31:37,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 394828654, now seen corresponding path program 1 times [2022-02-09 02:31:37,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:37,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8535451] [2022-02-09 02:31:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:37,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:38,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:38,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8535451] [2022-02-09 02:31:38,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8535451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:38,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:38,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:31:38,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857783172] [2022-02-09 02:31:38,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:38,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:31:38,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:31:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:38,009 INFO L87 Difference]: Start difference. First operand 1572 states and 6356 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:38,073 INFO L93 Difference]: Finished difference Result 1994 states and 7722 transitions. [2022-02-09 02:31:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 02:31:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:38,084 INFO L225 Difference]: With dead ends: 1994 [2022-02-09 02:31:38,084 INFO L226 Difference]: Without dead ends: 1957 [2022-02-09 02:31:38,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:38,086 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:38,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:31:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-02-09 02:31:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1691. [2022-02-09 02:31:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.973372781065089) internal successors, (6715), 1690 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 6715 transitions. [2022-02-09 02:31:38,151 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 6715 transitions. Word has length 22 [2022-02-09 02:31:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:38,151 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 6715 transitions. [2022-02-09 02:31:38,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 6715 transitions. [2022-02-09 02:31:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:38,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:38,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:38,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-09 02:31:38,157 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash -419159677, now seen corresponding path program 1 times [2022-02-09 02:31:38,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:38,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584188643] [2022-02-09 02:31:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:38,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:38,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:38,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584188643] [2022-02-09 02:31:38,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584188643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:38,193 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:38,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:31:38,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836266360] [2022-02-09 02:31:38,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:38,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:31:38,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:31:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:38,196 INFO L87 Difference]: Start difference. First operand 1691 states and 6715 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:38,260 INFO L93 Difference]: Finished difference Result 2484 states and 9587 transitions. [2022-02-09 02:31:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:38,278 INFO L225 Difference]: With dead ends: 2484 [2022-02-09 02:31:38,278 INFO L226 Difference]: Without dead ends: 2464 [2022-02-09 02:31:38,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:38,279 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:38,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:31:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-02-09 02:31:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1763. [2022-02-09 02:31:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.9415437003405223) internal successors, (6945), 1762 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6945 transitions. [2022-02-09 02:31:38,333 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6945 transitions. Word has length 22 [2022-02-09 02:31:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:38,333 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 6945 transitions. [2022-02-09 02:31:38,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6945 transitions. [2022-02-09 02:31:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:38,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:38,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:38,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-09 02:31:38,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash -295891366, now seen corresponding path program 2 times [2022-02-09 02:31:38,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:38,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827823506] [2022-02-09 02:31:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:38,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:38,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:38,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827823506] [2022-02-09 02:31:38,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827823506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:38,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:38,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-09 02:31:38,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707383644] [2022-02-09 02:31:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:38,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 02:31:38,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 02:31:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:38,400 INFO L87 Difference]: Start difference. First operand 1763 states and 6945 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:38,460 INFO L93 Difference]: Finished difference Result 2218 states and 8604 transitions. [2022-02-09 02:31:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:38,477 INFO L225 Difference]: With dead ends: 2218 [2022-02-09 02:31:38,478 INFO L226 Difference]: Without dead ends: 2218 [2022-02-09 02:31:38,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:38,478 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:38,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 60 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:31:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-02-09 02:31:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1919. [2022-02-09 02:31:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2022-02-09 02:31:38,535 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2022-02-09 02:31:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:38,535 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2022-02-09 02:31:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2022-02-09 02:31:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:38,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:38,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:38,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-09 02:31:38,541 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:38,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1117416331, now seen corresponding path program 2 times [2022-02-09 02:31:38,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:38,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224672384] [2022-02-09 02:31:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:38,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:38,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:38,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224672384] [2022-02-09 02:31:38,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224672384] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:38,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:38,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:31:38,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199966450] [2022-02-09 02:31:38,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:38,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:31:38,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:31:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:38,581 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:38,646 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2022-02-09 02:31:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:38,663 INFO L225 Difference]: With dead ends: 2879 [2022-02-09 02:31:38,664 INFO L226 Difference]: Without dead ends: 2879 [2022-02-09 02:31:38,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:38,666 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:38,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 57 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:31:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-02-09 02:31:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2022-02-09 02:31:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2022-02-09 02:31:38,768 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2022-02-09 02:31:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:38,768 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2022-02-09 02:31:38,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2022-02-09 02:31:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-09 02:31:38,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:38,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:38,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-09 02:31:38,775 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1614170840, now seen corresponding path program 2 times [2022-02-09 02:31:38,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:38,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224272653] [2022-02-09 02:31:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:38,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:38,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:38,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224272653] [2022-02-09 02:31:38,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224272653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:38,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:38,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 02:31:38,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152257567] [2022-02-09 02:31:38,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:38,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 02:31:38,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 02:31:38,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 02:31:38,814 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:38,871 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2022-02-09 02:31:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-09 02:31:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:38,881 INFO L225 Difference]: With dead ends: 2839 [2022-02-09 02:31:38,882 INFO L226 Difference]: Without dead ends: 2811 [2022-02-09 02:31:38,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:38,883 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:38,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 02:31:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-02-09 02:31:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2022-02-09 02:31:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2022-02-09 02:31:38,949 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2022-02-09 02:31:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:38,950 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2022-02-09 02:31:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2022-02-09 02:31:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:38,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:38,959 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] [2022-02-09 02:31:38,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-09 02:31:38,959 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 94406160, now seen corresponding path program 1 times [2022-02-09 02:31:38,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:38,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553334017] [2022-02-09 02:31:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:38,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:39,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:39,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553334017] [2022-02-09 02:31:39,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553334017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:39,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580182884] [2022-02-09 02:31:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:39,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:39,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:39,031 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) [2022-02-09 02:31:39,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-09 02:31:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-09 02:31:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:39,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580182884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:39,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:39,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-02-09 02:31:39,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485728508] [2022-02-09 02:31:39,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:39,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-09 02:31:39,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-09 02:31:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-09 02:31:39,548 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:39,817 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2022-02-09 02:31:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-09 02:31:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:39,830 INFO L225 Difference]: With dead ends: 3791 [2022-02-09 02:31:39,831 INFO L226 Difference]: Without dead ends: 3655 [2022-02-09 02:31:39,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-09 02:31:39,832 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:39,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 101 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:31:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-02-09 02:31:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2022-02-09 02:31:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 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) [2022-02-09 02:31:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2022-02-09 02:31:39,906 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2022-02-09 02:31:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:39,906 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2022-02-09 02:31:39,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2022-02-09 02:31:39,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:39,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:39,913 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] [2022-02-09 02:31:39,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:40,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:40,134 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:40,135 INFO L85 PathProgramCache]: Analyzing trace with hash 661659470, now seen corresponding path program 2 times [2022-02-09 02:31:40,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:40,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917021824] [2022-02-09 02:31:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:40,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:40,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:40,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917021824] [2022-02-09 02:31:40,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917021824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:40,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612940398] [2022-02-09 02:31:40,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:31:40,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:40,193 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) [2022-02-09 02:31:40,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-09 02:31:40,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:31:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-09 02:31:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:40,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612940398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:40,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:40,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-02-09 02:31:40,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066021705] [2022-02-09 02:31:40,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:40,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 02:31:40,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 02:31:40,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-09 02:31:40,707 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:40,967 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2022-02-09 02:31:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-09 02:31:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:40,981 INFO L225 Difference]: With dead ends: 4004 [2022-02-09 02:31:40,982 INFO L226 Difference]: Without dead ends: 3868 [2022-02-09 02:31:40,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-09 02:31:40,982 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:40,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:31:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-02-09 02:31:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2022-02-09 02:31:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2022-02-09 02:31:41,072 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2022-02-09 02:31:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:41,072 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2022-02-09 02:31:41,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2022-02-09 02:31:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:41,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:41,080 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] [2022-02-09 02:31:41,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:41,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:41,301 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2111245980, now seen corresponding path program 3 times [2022-02-09 02:31:41,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:41,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597064345] [2022-02-09 02:31:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:41,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-09 02:31:41,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:41,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597064345] [2022-02-09 02:31:41,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597064345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:41,358 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:41,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-09 02:31:41,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109411060] [2022-02-09 02:31:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:41,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 02:31:41,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 02:31:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:41,360 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:41,484 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2022-02-09 02:31:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:41,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:41,498 INFO L225 Difference]: With dead ends: 4207 [2022-02-09 02:31:41,498 INFO L226 Difference]: Without dead ends: 4139 [2022-02-09 02:31:41,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:41,499 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:41,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 02:31:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-02-09 02:31:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2022-02-09 02:31:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2022-02-09 02:31:41,584 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2022-02-09 02:31:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:41,585 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2022-02-09 02:31:41,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:41,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2022-02-09 02:31:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:41,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:41,593 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] [2022-02-09 02:31:41,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-09 02:31:41,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash -12774180, now seen corresponding path program 1 times [2022-02-09 02:31:41,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:41,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648266506] [2022-02-09 02:31:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:41,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:41,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:41,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648266506] [2022-02-09 02:31:41,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648266506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:41,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462475369] [2022-02-09 02:31:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:41,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:41,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:41,645 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) [2022-02-09 02:31:41,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-09 02:31:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-09 02:31:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:41,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:42,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462475369] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:42,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:42,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-02-09 02:31:42,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658179560] [2022-02-09 02:31:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:42,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-09 02:31:42,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-09 02:31:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-09 02:31:42,018 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:42,273 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2022-02-09 02:31:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-09 02:31:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:42,289 INFO L225 Difference]: With dead ends: 4729 [2022-02-09 02:31:42,290 INFO L226 Difference]: Without dead ends: 4627 [2022-02-09 02:31:42,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-09 02:31:42,290 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:42,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 104 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:31:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2022-02-09 02:31:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2022-02-09 02:31:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2022-02-09 02:31:42,389 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2022-02-09 02:31:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:42,389 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2022-02-09 02:31:42,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2022-02-09 02:31:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:42,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:42,398 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] [2022-02-09 02:31:42,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:42,615 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,SelfDestructingSolverStorable11 [2022-02-09 02:31:42,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -418861160, now seen corresponding path program 2 times [2022-02-09 02:31:42,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:42,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008493949] [2022-02-09 02:31:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:42,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:42,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:42,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008493949] [2022-02-09 02:31:42,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008493949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:42,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800629057] [2022-02-09 02:31:42,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:31:42,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:42,664 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) [2022-02-09 02:31:42,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-09 02:31:42,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:31:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-09 02:31:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:43,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:43,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800629057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:43,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:43,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-02-09 02:31:43,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885237817] [2022-02-09 02:31:43,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:43,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 02:31:43,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 02:31:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-09 02:31:43,101 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:43,372 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2022-02-09 02:31:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-09 02:31:43,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:43,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:43,387 INFO L225 Difference]: With dead ends: 4946 [2022-02-09 02:31:43,388 INFO L226 Difference]: Without dead ends: 4844 [2022-02-09 02:31:43,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-09 02:31:43,388 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:43,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 108 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:31:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2022-02-09 02:31:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2022-02-09 02:31:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2022-02-09 02:31:43,482 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2022-02-09 02:31:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:43,482 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2022-02-09 02:31:43,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2022-02-09 02:31:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 02:31:43,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:43,493 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] [2022-02-09 02:31:43,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:43,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:43,710 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1398947880, now seen corresponding path program 3 times [2022-02-09 02:31:43,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:43,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902813563] [2022-02-09 02:31:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:43,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-09 02:31:43,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:43,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902813563] [2022-02-09 02:31:43,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902813563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 02:31:43,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 02:31:43,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-09 02:31:43,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119289070] [2022-02-09 02:31:43,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 02:31:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 02:31:43,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 02:31:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:43,758 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:43,881 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2022-02-09 02:31:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 02:31:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-09 02:31:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:43,897 INFO L225 Difference]: With dead ends: 5169 [2022-02-09 02:31:43,898 INFO L226 Difference]: Without dead ends: 5118 [2022-02-09 02:31:43,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 02:31:43,898 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:43,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 52 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 02:31:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2022-02-09 02:31:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2022-02-09 02:31:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2022-02-09 02:31:44,059 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2022-02-09 02:31:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:44,059 INFO L470 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2022-02-09 02:31:44,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2022-02-09 02:31:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:44,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:44,071 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] [2022-02-09 02:31:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-09 02:31:44,071 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:44,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1060747875, now seen corresponding path program 4 times [2022-02-09 02:31:44,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:44,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908537810] [2022-02-09 02:31:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:44,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:44,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:44,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908537810] [2022-02-09 02:31:44,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908537810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:44,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64861482] [2022-02-09 02:31:44,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:31:44,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:44,125 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) [2022-02-09 02:31:44,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-09 02:31:44,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:31:44,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:44,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:44,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64861482] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:44,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:44,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-09 02:31:44,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125665562] [2022-02-09 02:31:44,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:44,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:44,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:44,301 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:45,075 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2022-02-09 02:31:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-09 02:31:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:45,110 INFO L225 Difference]: With dead ends: 11402 [2022-02-09 02:31:45,110 INFO L226 Difference]: Without dead ends: 11402 [2022-02-09 02:31:45,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 02:31:45,111 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 368 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:45,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 665 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:31:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2022-02-09 02:31:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2022-02-09 02:31:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2022-02-09 02:31:45,353 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2022-02-09 02:31:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:45,353 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2022-02-09 02:31:45,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2022-02-09 02:31:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:45,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:45,368 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] [2022-02-09 02:31:45,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:45,585 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 [2022-02-09 02:31:45,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1873088312, now seen corresponding path program 5 times [2022-02-09 02:31:45,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:45,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312526974] [2022-02-09 02:31:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:45,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:45,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:45,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312526974] [2022-02-09 02:31:45,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312526974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:45,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727380238] [2022-02-09 02:31:45,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:31:45,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:45,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:45,667 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) [2022-02-09 02:31:45,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-09 02:31:45,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 02:31:45,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:45,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:45,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:45,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727380238] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:45,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:45,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-09 02:31:45,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094935909] [2022-02-09 02:31:45,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:45,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:45,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:45,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:45,833 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:46,498 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2022-02-09 02:31:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:31:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:46,554 INFO L225 Difference]: With dead ends: 15383 [2022-02-09 02:31:46,554 INFO L226 Difference]: Without dead ends: 15203 [2022-02-09 02:31:46,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:31:46,555 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 447 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:46,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 467 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:31:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2022-02-09 02:31:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2022-02-09 02:31:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2022-02-09 02:31:46,925 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2022-02-09 02:31:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:46,925 INFO L470 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2022-02-09 02:31:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2022-02-09 02:31:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:47,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:47,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:47,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:47,216 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 [2022-02-09 02:31:47,216 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:47,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1274103240, now seen corresponding path program 6 times [2022-02-09 02:31:47,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:47,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129669029] [2022-02-09 02:31:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:47,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:47,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:47,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129669029] [2022-02-09 02:31:47,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129669029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:47,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018464662] [2022-02-09 02:31:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:31:47,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:47,247 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) [2022-02-09 02:31:47,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-09 02:31:47,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:31:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:47,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:47,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018464662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:47,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:47,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:31:47,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918287543] [2022-02-09 02:31:47,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:31:47,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:31:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:31:47,428 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:47,905 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2022-02-09 02:31:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:31:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:47,961 INFO L225 Difference]: With dead ends: 16184 [2022-02-09 02:31:47,961 INFO L226 Difference]: Without dead ends: 16184 [2022-02-09 02:31:47,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-02-09 02:31:47,962 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 452 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:47,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 323 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-02-09 02:31:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2022-02-09 02:31:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2022-02-09 02:31:48,319 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2022-02-09 02:31:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:48,319 INFO L470 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2022-02-09 02:31:48,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2022-02-09 02:31:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:48,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:48,338 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] [2022-02-09 02:31:48,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-09 02:31:48,539 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 [2022-02-09 02:31:48,539 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:48,539 INFO L85 PathProgramCache]: Analyzing trace with hash 289276885, now seen corresponding path program 7 times [2022-02-09 02:31:48,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:48,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560244093] [2022-02-09 02:31:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:48,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:48,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:48,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560244093] [2022-02-09 02:31:48,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560244093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:48,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156101674] [2022-02-09 02:31:48,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:31:48,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:48,634 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) [2022-02-09 02:31:48,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-09 02:31:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:48,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:48,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156101674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:48,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:48,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:31:48,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184997620] [2022-02-09 02:31:48,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:48,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:31:48,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:31:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:31:48,819 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:49,138 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2022-02-09 02:31:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-09 02:31:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:49,168 INFO L225 Difference]: With dead ends: 10083 [2022-02-09 02:31:49,168 INFO L226 Difference]: Without dead ends: 10027 [2022-02-09 02:31:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-09 02:31:49,169 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 198 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:49,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 356 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:31:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2022-02-09 02:31:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2022-02-09 02:31:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2022-02-09 02:31:49,422 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2022-02-09 02:31:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:49,422 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2022-02-09 02:31:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2022-02-09 02:31:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:49,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:49,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:31:49,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:49,644 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 [2022-02-09 02:31:49,644 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash 241482535, now seen corresponding path program 8 times [2022-02-09 02:31:49,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:49,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575497132] [2022-02-09 02:31:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:49,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:49,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:49,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575497132] [2022-02-09 02:31:49,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575497132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:49,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604584182] [2022-02-09 02:31:49,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:31:49,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:49,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:49,671 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) [2022-02-09 02:31:49,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-09 02:31:49,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:31:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:49,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:49,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604584182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:49,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:49,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-02-09 02:31:49,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785793937] [2022-02-09 02:31:49,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:49,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:49,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:49,839 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:50,355 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2022-02-09 02:31:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 02:31:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:50,512 INFO L225 Difference]: With dead ends: 17529 [2022-02-09 02:31:50,512 INFO L226 Difference]: Without dead ends: 17529 [2022-02-09 02:31:50,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-02-09 02:31:50,513 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 439 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:50,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 407 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:50,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2022-02-09 02:31:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2022-02-09 02:31:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2022-02-09 02:31:50,875 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2022-02-09 02:31:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:50,875 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2022-02-09 02:31:50,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2022-02-09 02:31:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:50,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:50,894 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] [2022-02-09 02:31:50,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:51,094 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 [2022-02-09 02:31:51,095 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 220136762, now seen corresponding path program 9 times [2022-02-09 02:31:51,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:51,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183543947] [2022-02-09 02:31:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:51,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:51,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:51,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183543947] [2022-02-09 02:31:51,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183543947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:51,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951637131] [2022-02-09 02:31:51,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:31:51,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:51,125 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) [2022-02-09 02:31:51,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-09 02:31:51,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 02:31:51,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:51,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951637131] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:51,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:51,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-02-09 02:31:51,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138677252] [2022-02-09 02:31:51,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:51,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:51,351 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:51,879 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2022-02-09 02:31:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 02:31:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:51,934 INFO L225 Difference]: With dead ends: 15647 [2022-02-09 02:31:51,935 INFO L226 Difference]: Without dead ends: 15587 [2022-02-09 02:31:51,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-02-09 02:31:51,937 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 294 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:51,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 526 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2022-02-09 02:31:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2022-02-09 02:31:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2022-02-09 02:31:52,243 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2022-02-09 02:31:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2022-02-09 02:31:52,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2022-02-09 02:31:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:52,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:52,261 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] [2022-02-09 02:31:52,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:52,461 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 [2022-02-09 02:31:52,461 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 993498946, now seen corresponding path program 10 times [2022-02-09 02:31:52,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:52,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302766422] [2022-02-09 02:31:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:52,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:52,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:52,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302766422] [2022-02-09 02:31:52,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302766422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:52,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258710860] [2022-02-09 02:31:52,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:31:52,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:52,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:52,488 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) [2022-02-09 02:31:52,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-09 02:31:52,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:31:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:52,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:52,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258710860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:52,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:52,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-02-09 02:31:52,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799884737] [2022-02-09 02:31:52,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:52,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:52,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:52,651 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:53,293 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2022-02-09 02:31:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 02:31:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:53,462 INFO L225 Difference]: With dead ends: 18798 [2022-02-09 02:31:53,462 INFO L226 Difference]: Without dead ends: 18798 [2022-02-09 02:31:53,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-09 02:31:53,463 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 392 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:53,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 525 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:31:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2022-02-09 02:31:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2022-02-09 02:31:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2022-02-09 02:31:53,806 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2022-02-09 02:31:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:53,806 INFO L470 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2022-02-09 02:31:53,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2022-02-09 02:31:53,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:53,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:53,825 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] [2022-02-09 02:31:53,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:54,041 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 [2022-02-09 02:31:54,042 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1738088225, now seen corresponding path program 11 times [2022-02-09 02:31:54,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:54,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021924813] [2022-02-09 02:31:54,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:54,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:54,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:54,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021924813] [2022-02-09 02:31:54,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021924813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:54,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348034719] [2022-02-09 02:31:54,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:31:54,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:54,069 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) [2022-02-09 02:31:54,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-09 02:31:54,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 02:31:54,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:54,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:54,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:54,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348034719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:54,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:54,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-02-09 02:31:54,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126562926] [2022-02-09 02:31:54,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:54,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:31:54,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:31:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:31:54,219 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:54,716 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2022-02-09 02:31:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:31:54,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:54,855 INFO L225 Difference]: With dead ends: 14070 [2022-02-09 02:31:54,855 INFO L226 Difference]: Without dead ends: 14014 [2022-02-09 02:31:54,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-02-09 02:31:54,856 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 326 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:54,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 489 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2022-02-09 02:31:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2022-02-09 02:31:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2022-02-09 02:31:55,080 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2022-02-09 02:31:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:55,080 INFO L470 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2022-02-09 02:31:55,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2022-02-09 02:31:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:55,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:55,099 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] [2022-02-09 02:31:55,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-09 02:31:55,299 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 [2022-02-09 02:31:55,299 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1830310576, now seen corresponding path program 12 times [2022-02-09 02:31:55,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:55,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504198164] [2022-02-09 02:31:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:55,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:55,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:55,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504198164] [2022-02-09 02:31:55,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504198164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:55,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967460884] [2022-02-09 02:31:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:31:55,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:55,405 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) [2022-02-09 02:31:55,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-09 02:31:55,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:31:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:55,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:55,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967460884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:55,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:55,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:31:55,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723719320] [2022-02-09 02:31:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:55,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:31:55,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:31:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:31:55,587 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:56,391 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2022-02-09 02:31:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:31:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:56,450 INFO L225 Difference]: With dead ends: 18926 [2022-02-09 02:31:56,450 INFO L226 Difference]: Without dead ends: 18926 [2022-02-09 02:31:56,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-02-09 02:31:56,452 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 395 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:56,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 664 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:31:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2022-02-09 02:31:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2022-02-09 02:31:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2022-02-09 02:31:56,832 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2022-02-09 02:31:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:56,832 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2022-02-09 02:31:56,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2022-02-09 02:31:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:56,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:56,852 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] [2022-02-09 02:31:56,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:57,068 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 [2022-02-09 02:31:57,068 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2104471513, now seen corresponding path program 13 times [2022-02-09 02:31:57,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:57,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625006506] [2022-02-09 02:31:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:57,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:57,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:57,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625006506] [2022-02-09 02:31:57,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625006506] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:57,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815747109] [2022-02-09 02:31:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:31:57,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:57,100 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) [2022-02-09 02:31:57,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-09 02:31:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:57,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:57,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:57,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815747109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:57,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:57,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:31:57,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36497622] [2022-02-09 02:31:57,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:57,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:31:57,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:31:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:31:57,260 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:57,751 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2022-02-09 02:31:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:31:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:57,792 INFO L225 Difference]: With dead ends: 12612 [2022-02-09 02:31:57,792 INFO L226 Difference]: Without dead ends: 12556 [2022-02-09 02:31:57,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-02-09 02:31:57,794 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 369 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:57,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 482 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2022-02-09 02:31:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2022-02-09 02:31:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2022-02-09 02:31:58,113 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2022-02-09 02:31:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:58,114 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2022-02-09 02:31:58,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2022-02-09 02:31:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:58,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:58,132 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, 1] [2022-02-09 02:31:58,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:58,332 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 [2022-02-09 02:31:58,332 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:58,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1022959335, now seen corresponding path program 14 times [2022-02-09 02:31:58,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:58,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077222379] [2022-02-09 02:31:58,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:58,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:58,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:58,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077222379] [2022-02-09 02:31:58,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077222379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:58,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736794815] [2022-02-09 02:31:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:31:58,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:58,367 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) [2022-02-09 02:31:58,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-09 02:31:58,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:31:58,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:58,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:58,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736794815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:58,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:58,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:31:58,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457282937] [2022-02-09 02:31:58,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:58,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:31:58,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:31:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:31:58,532 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:31:58,960 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2022-02-09 02:31:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-09 02:31:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:31:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:31:59,009 INFO L225 Difference]: With dead ends: 16530 [2022-02-09 02:31:59,009 INFO L226 Difference]: Without dead ends: 16530 [2022-02-09 02:31:59,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-02-09 02:31:59,010 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 421 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:31:59,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 308 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:31:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2022-02-09 02:31:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2022-02-09 02:31:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2022-02-09 02:31:59,290 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2022-02-09 02:31:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:31:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2022-02-09 02:31:59,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:31:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2022-02-09 02:31:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:31:59,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:31:59,309 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] [2022-02-09 02:31:59,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-09 02:31:59,510 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 [2022-02-09 02:31:59,510 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:31:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:31:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1044305108, now seen corresponding path program 15 times [2022-02-09 02:31:59,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:31:59,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550381072] [2022-02-09 02:31:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:31:59,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:31:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:31:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:59,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:31:59,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550381072] [2022-02-09 02:31:59,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550381072] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:31:59,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014450015] [2022-02-09 02:31:59,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:31:59,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:31:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:31:59,544 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) [2022-02-09 02:31:59,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-09 02:31:59,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 02:31:59,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:31:59,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:31:59,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:31:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:31:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:31:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:31:59,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014450015] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:31:59,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:31:59,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:31:59,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68453088] [2022-02-09 02:31:59,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:31:59,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:31:59,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:31:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:31:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:31:59,692 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:00,104 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2022-02-09 02:32:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-09 02:32:00,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:00,139 INFO L225 Difference]: With dead ends: 11652 [2022-02-09 02:32:00,140 INFO L226 Difference]: Without dead ends: 11632 [2022-02-09 02:32:00,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-09 02:32:00,140 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 183 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 491 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2022-02-09 02:32:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2022-02-09 02:32:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2022-02-09 02:32:00,356 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2022-02-09 02:32:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:00,357 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2022-02-09 02:32:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2022-02-09 02:32:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:00,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:00,374 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] [2022-02-09 02:32:00,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:00,583 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 [2022-02-09 02:32:00,583 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash -270942924, now seen corresponding path program 16 times [2022-02-09 02:32:00,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:00,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430963521] [2022-02-09 02:32:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:00,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:00,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:00,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430963521] [2022-02-09 02:32:00,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430963521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:00,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876126980] [2022-02-09 02:32:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:32:00,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:00,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:00,615 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) [2022-02-09 02:32:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-09 02:32:00,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:32:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:00,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:00,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:00,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876126980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:00,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:00,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:32:00,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929768178] [2022-02-09 02:32:00,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:00,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:32:00,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:32:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:32:00,765 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:01,208 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2022-02-09 02:32:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-09 02:32:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:01,255 INFO L225 Difference]: With dead ends: 13573 [2022-02-09 02:32:01,256 INFO L226 Difference]: Without dead ends: 13573 [2022-02-09 02:32:01,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-02-09 02:32:01,256 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 297 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:01,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 437 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2022-02-09 02:32:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2022-02-09 02:32:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2022-02-09 02:32:01,493 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2022-02-09 02:32:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:01,493 INFO L470 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2022-02-09 02:32:01,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2022-02-09 02:32:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:01,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:01,510 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] [2022-02-09 02:32:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:01,711 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 [2022-02-09 02:32:01,711 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1292437201, now seen corresponding path program 17 times [2022-02-09 02:32:01,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:01,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474587196] [2022-02-09 02:32:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:01,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:01,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:01,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474587196] [2022-02-09 02:32:01,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474587196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:01,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203551358] [2022-02-09 02:32:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:32:01,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:01,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:01,736 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) [2022-02-09 02:32:01,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-09 02:32:01,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 02:32:01,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:01,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:01,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203551358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:01,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:01,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-02-09 02:32:01,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6779758] [2022-02-09 02:32:01,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:01,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 02:32:01,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 02:32:01,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-09 02:32:01,907 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:02,348 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2022-02-09 02:32:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 02:32:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:02,394 INFO L225 Difference]: With dead ends: 14465 [2022-02-09 02:32:02,394 INFO L226 Difference]: Without dead ends: 14437 [2022-02-09 02:32:02,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-02-09 02:32:02,395 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 354 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:02,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 395 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 02:32:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2022-02-09 02:32:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2022-02-09 02:32:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2022-02-09 02:32:02,693 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2022-02-09 02:32:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:02,693 INFO L470 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2022-02-09 02:32:02,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2022-02-09 02:32:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:02,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:02,712 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] [2022-02-09 02:32:02,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:02,927 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 [2022-02-09 02:32:02,927 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 565868706, now seen corresponding path program 18 times [2022-02-09 02:32:02,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:02,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069989625] [2022-02-09 02:32:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:02,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:02,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:02,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069989625] [2022-02-09 02:32:02,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069989625] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:02,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957701510] [2022-02-09 02:32:02,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:32:02,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:02,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:02,972 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) [2022-02-09 02:32:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-09 02:32:02,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:32:02,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:03,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:03,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957701510] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:03,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:03,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-02-09 02:32:03,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304135741] [2022-02-09 02:32:03,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:03,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:03,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:03,119 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:03,806 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2022-02-09 02:32:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-09 02:32:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:03,860 INFO L225 Difference]: With dead ends: 17059 [2022-02-09 02:32:03,860 INFO L226 Difference]: Without dead ends: 17059 [2022-02-09 02:32:03,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-02-09 02:32:03,861 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 434 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:03,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 614 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:32:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2022-02-09 02:32:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2022-02-09 02:32:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2022-02-09 02:32:04,167 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2022-02-09 02:32:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:04,168 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2022-02-09 02:32:04,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2022-02-09 02:32:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:04,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:04,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:32:04,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:04,386 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 [2022-02-09 02:32:04,386 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash 926053913, now seen corresponding path program 19 times [2022-02-09 02:32:04,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:04,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550587690] [2022-02-09 02:32:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:04,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:04,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550587690] [2022-02-09 02:32:04,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550587690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:04,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635314846] [2022-02-09 02:32:04,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:32:04,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:04,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:04,416 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) [2022-02-09 02:32:04,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-09 02:32:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:04,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635314846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:04,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:04,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-02-09 02:32:04,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898200547] [2022-02-09 02:32:04,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:04,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:04,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:04,562 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:05,131 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2022-02-09 02:32:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:32:05,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:05,188 INFO L225 Difference]: With dead ends: 17336 [2022-02-09 02:32:05,189 INFO L226 Difference]: Without dead ends: 17224 [2022-02-09 02:32:05,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-02-09 02:32:05,189 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 470 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:05,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 449 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2022-02-09 02:32:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2022-02-09 02:32:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2022-02-09 02:32:05,538 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2022-02-09 02:32:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:05,538 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2022-02-09 02:32:05,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2022-02-09 02:32:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:05,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:05,557 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, 1] [2022-02-09 02:32:05,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-02-09 02:32:05,758 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 [2022-02-09 02:32:05,758 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 159994808, now seen corresponding path program 20 times [2022-02-09 02:32:05,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:05,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440919885] [2022-02-09 02:32:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:05,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:05,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:05,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440919885] [2022-02-09 02:32:05,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440919885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:05,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543917292] [2022-02-09 02:32:05,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:32:05,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:05,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:05,790 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) [2022-02-09 02:32:05,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-09 02:32:05,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:32:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:05,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:05,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543917292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:05,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:05,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-09 02:32:05,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522521805] [2022-02-09 02:32:05,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:05,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:05,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:05,927 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:06,679 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2022-02-09 02:32:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-09 02:32:06,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:06,720 INFO L225 Difference]: With dead ends: 13676 [2022-02-09 02:32:06,720 INFO L226 Difference]: Without dead ends: 13676 [2022-02-09 02:32:06,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 02:32:06,721 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 319 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:06,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 729 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:32:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2022-02-09 02:32:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2022-02-09 02:32:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2022-02-09 02:32:06,941 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2022-02-09 02:32:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:06,941 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2022-02-09 02:32:06,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2022-02-09 02:32:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:06,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:06,960 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] [2022-02-09 02:32:06,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-09 02:32:07,163 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 [2022-02-09 02:32:07,163 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1451531985, now seen corresponding path program 21 times [2022-02-09 02:32:07,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:07,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096650300] [2022-02-09 02:32:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:07,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:07,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:07,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096650300] [2022-02-09 02:32:07,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096650300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:07,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168620203] [2022-02-09 02:32:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:32:07,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:07,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:07,199 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) [2022-02-09 02:32:07,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-09 02:32:07,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 02:32:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:07,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:07,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168620203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:07,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:07,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-02-09 02:32:07,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169339543] [2022-02-09 02:32:07,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:07,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:07,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:07,340 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:07,878 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2022-02-09 02:32:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-09 02:32:07,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:07,922 INFO L225 Difference]: With dead ends: 15155 [2022-02-09 02:32:07,922 INFO L226 Difference]: Without dead ends: 15043 [2022-02-09 02:32:07,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2022-02-09 02:32:07,923 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 398 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 474 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2022-02-09 02:32:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2022-02-09 02:32:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2022-02-09 02:32:08,175 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2022-02-09 02:32:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:08,175 INFO L470 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2022-02-09 02:32:08,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2022-02-09 02:32:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:08,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:08,196 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] [2022-02-09 02:32:08,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-09 02:32:08,396 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 [2022-02-09 02:32:08,397 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -772972101, now seen corresponding path program 22 times [2022-02-09 02:32:08,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:08,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161100237] [2022-02-09 02:32:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:08,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:08,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:08,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161100237] [2022-02-09 02:32:08,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161100237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:08,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542213711] [2022-02-09 02:32:08,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:32:08,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:08,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:08,427 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) [2022-02-09 02:32:08,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-09 02:32:08,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:32:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:08,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:08,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542213711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:08,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:08,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:32:08,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214904669] [2022-02-09 02:32:08,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:08,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:08,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:08,567 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:09,309 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2022-02-09 02:32:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:32:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:09,363 INFO L225 Difference]: With dead ends: 16354 [2022-02-09 02:32:09,363 INFO L226 Difference]: Without dead ends: 16354 [2022-02-09 02:32:09,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-02-09 02:32:09,364 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 374 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:09,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 625 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:32:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2022-02-09 02:32:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2022-02-09 02:32:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2022-02-09 02:32:09,618 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2022-02-09 02:32:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:09,618 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2022-02-09 02:32:09,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2022-02-09 02:32:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:09,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:09,636 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] [2022-02-09 02:32:09,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-09 02:32:09,837 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 [2022-02-09 02:32:09,837 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1482563436, now seen corresponding path program 23 times [2022-02-09 02:32:09,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:09,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942332404] [2022-02-09 02:32:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:09,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:09,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:09,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942332404] [2022-02-09 02:32:09,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942332404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:09,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133259307] [2022-02-09 02:32:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:32:09,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:09,870 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) [2022-02-09 02:32:09,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-09 02:32:09,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:32:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:09,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:10,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133259307] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:10,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:10,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:32:10,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332985804] [2022-02-09 02:32:10,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:10,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:10,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:10,014 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:10,496 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2022-02-09 02:32:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:32:10,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:10,536 INFO L225 Difference]: With dead ends: 12762 [2022-02-09 02:32:10,536 INFO L226 Difference]: Without dead ends: 12722 [2022-02-09 02:32:10,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-02-09 02:32:10,537 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 363 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:10,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 450 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2022-02-09 02:32:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2022-02-09 02:32:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2022-02-09 02:32:10,761 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2022-02-09 02:32:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:10,762 INFO L470 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2022-02-09 02:32:10,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2022-02-09 02:32:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:10,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:10,779 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] [2022-02-09 02:32:10,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:10,980 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 [2022-02-09 02:32:10,980 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -883655600, now seen corresponding path program 4 times [2022-02-09 02:32:10,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:10,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190454979] [2022-02-09 02:32:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:10,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:11,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:11,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190454979] [2022-02-09 02:32:11,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190454979] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:11,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838956273] [2022-02-09 02:32:11,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:32:11,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:11,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:11,017 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) [2022-02-09 02:32:11,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-09 02:32:11,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:32:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:11,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:11,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838956273] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:11,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:11,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-09 02:32:11,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219456404] [2022-02-09 02:32:11,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:11,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:11,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:11,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:11,164 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:12,086 INFO L93 Difference]: Finished difference Result 30696 states and 121806 transitions. [2022-02-09 02:32:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-09 02:32:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:12,202 INFO L225 Difference]: With dead ends: 30696 [2022-02-09 02:32:12,203 INFO L226 Difference]: Without dead ends: 30696 [2022-02-09 02:32:12,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-02-09 02:32:12,203 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 413 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:12,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 766 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:32:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30696 states. [2022-02-09 02:32:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30696 to 14412. [2022-02-09 02:32:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2022-02-09 02:32:12,747 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2022-02-09 02:32:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:12,747 INFO L470 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2022-02-09 02:32:12,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2022-02-09 02:32:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:12,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:12,781 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] [2022-02-09 02:32:12,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-09 02:32:12,982 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 [2022-02-09 02:32:12,982 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1256946325, now seen corresponding path program 5 times [2022-02-09 02:32:12,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:12,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621320489] [2022-02-09 02:32:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:12,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:13,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:13,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621320489] [2022-02-09 02:32:13,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621320489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:13,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416463552] [2022-02-09 02:32:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:32:13,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:13,017 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) [2022-02-09 02:32:13,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-09 02:32:13,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 02:32:13,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:13,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:13,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416463552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:13,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:13,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-09 02:32:13,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601128893] [2022-02-09 02:32:13,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:13,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:13,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:13,176 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:14,023 INFO L93 Difference]: Finished difference Result 42800 states and 170574 transitions. [2022-02-09 02:32:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-09 02:32:14,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:14,190 INFO L225 Difference]: With dead ends: 42800 [2022-02-09 02:32:14,190 INFO L226 Difference]: Without dead ends: 42559 [2022-02-09 02:32:14,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 02:32:14,191 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 441 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:14,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 608 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:32:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42559 states. [2022-02-09 02:32:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42559 to 25911. [2022-02-09 02:32:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25911 states, 25910 states have (on average 4.2748745658047085) internal successors, (110762), 25910 states have internal predecessors, (110762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25911 states to 25911 states and 110762 transitions. [2022-02-09 02:32:15,036 INFO L78 Accepts]: Start accepts. Automaton has 25911 states and 110762 transitions. Word has length 28 [2022-02-09 02:32:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:15,036 INFO L470 AbstractCegarLoop]: Abstraction has 25911 states and 110762 transitions. [2022-02-09 02:32:15,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25911 states and 110762 transitions. [2022-02-09 02:32:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:15,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:15,107 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] [2022-02-09 02:32:15,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:15,311 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 [2022-02-09 02:32:15,311 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1678023439, now seen corresponding path program 6 times [2022-02-09 02:32:15,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:15,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044669883] [2022-02-09 02:32:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:15,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:15,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:15,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044669883] [2022-02-09 02:32:15,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044669883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:15,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13422338] [2022-02-09 02:32:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:32:15,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:15,339 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) [2022-02-09 02:32:15,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-09 02:32:15,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:32:15,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:15,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13422338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:15,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:15,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:15,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673546532] [2022-02-09 02:32:15,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:15,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:15,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:15,485 INFO L87 Difference]: Start difference. First operand 25911 states and 110762 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2022-02-09 02:32:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:16,194 INFO L93 Difference]: Finished difference Result 47437 states and 189585 transitions. [2022-02-09 02:32:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 02:32:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 28 [2022-02-09 02:32:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:16,384 INFO L225 Difference]: With dead ends: 47437 [2022-02-09 02:32:16,384 INFO L226 Difference]: Without dead ends: 47437 [2022-02-09 02:32:16,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-02-09 02:32:16,385 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 454 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:16,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 386 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47437 states. [2022-02-09 02:32:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47437 to 25754. [2022-02-09 02:32:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25754 states, 25753 states have (on average 4.2497184794004585) internal successors, (109443), 25753 states have internal predecessors, (109443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25754 states to 25754 states and 109443 transitions. [2022-02-09 02:32:17,568 INFO L78 Accepts]: Start accepts. Automaton has 25754 states and 109443 transitions. Word has length 28 [2022-02-09 02:32:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 25754 states and 109443 transitions. [2022-02-09 02:32:17,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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) [2022-02-09 02:32:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 25754 states and 109443 transitions. [2022-02-09 02:32:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:17,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:17,636 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] [2022-02-09 02:32:17,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-09 02:32:17,839 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 [2022-02-09 02:32:17,839 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565522, now seen corresponding path program 7 times [2022-02-09 02:32:17,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:17,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351473093] [2022-02-09 02:32:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:17,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:17,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:17,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351473093] [2022-02-09 02:32:17,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351473093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:17,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285803777] [2022-02-09 02:32:17,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:32:17,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:17,890 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) [2022-02-09 02:32:17,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-09 02:32:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:17,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:18,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285803777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:18,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:18,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:18,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150880062] [2022-02-09 02:32:18,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:18,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:18,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:18,036 INFO L87 Difference]: Start difference. First operand 25754 states and 109443 transitions. Second operand has 10 states, 10 states have (on average 4.2) 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) [2022-02-09 02:32:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:18,567 INFO L93 Difference]: Finished difference Result 31353 states and 128475 transitions. [2022-02-09 02:32:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 02:32:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) 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 28 [2022-02-09 02:32:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:18,682 INFO L225 Difference]: With dead ends: 31353 [2022-02-09 02:32:18,683 INFO L226 Difference]: Without dead ends: 31305 [2022-02-09 02:32:18,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-02-09 02:32:18,683 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 213 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:18,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 525 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31305 states. [2022-02-09 02:32:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31305 to 25920. [2022-02-09 02:32:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25920 states, 25919 states have (on average 4.244916856360199) internal successors, (110024), 25919 states have internal predecessors, (110024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25920 states to 25920 states and 110024 transitions. [2022-02-09 02:32:19,560 INFO L78 Accepts]: Start accepts. Automaton has 25920 states and 110024 transitions. Word has length 28 [2022-02-09 02:32:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:19,561 INFO L470 AbstractCegarLoop]: Abstraction has 25920 states and 110024 transitions. [2022-02-09 02:32:19,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) 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) [2022-02-09 02:32:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25920 states and 110024 transitions. [2022-02-09 02:32:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:19,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:19,627 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] [2022-02-09 02:32:19,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-09 02:32:19,827 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 [2022-02-09 02:32:19,828 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:19,828 INFO L85 PathProgramCache]: Analyzing trace with hash -839730284, now seen corresponding path program 8 times [2022-02-09 02:32:19,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:19,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208182696] [2022-02-09 02:32:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:19,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:19,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:19,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208182696] [2022-02-09 02:32:19,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208182696] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:19,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34149713] [2022-02-09 02:32:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:32:19,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:19,858 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) [2022-02-09 02:32:19,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-09 02:32:19,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:32:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:19,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:20,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34149713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:20,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:20,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-02-09 02:32:20,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590258438] [2022-02-09 02:32:20,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:20,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:20,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:20,011 INFO L87 Difference]: Start difference. First operand 25920 states and 110024 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:21,208 INFO L93 Difference]: Finished difference Result 68541 states and 278478 transitions. [2022-02-09 02:32:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-09 02:32:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:21,749 INFO L225 Difference]: With dead ends: 68541 [2022-02-09 02:32:21,749 INFO L226 Difference]: Without dead ends: 68541 [2022-02-09 02:32:21,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-02-09 02:32:21,750 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:21,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 394 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68541 states. [2022-02-09 02:32:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68541 to 33948. [2022-02-09 02:32:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33948 states, 33947 states have (on average 4.294783044157068) internal successors, (145795), 33947 states have internal predecessors, (145795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 145795 transitions. [2022-02-09 02:32:23,347 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 145795 transitions. Word has length 28 [2022-02-09 02:32:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 33948 states and 145795 transitions. [2022-02-09 02:32:23,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 145795 transitions. [2022-02-09 02:32:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:23,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:23,447 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] [2022-02-09 02:32:23,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-09 02:32:23,647 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 [2022-02-09 02:32:23,647 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash -71294673, now seen corresponding path program 9 times [2022-02-09 02:32:23,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:23,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085933039] [2022-02-09 02:32:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:23,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:23,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:23,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085933039] [2022-02-09 02:32:23,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085933039] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:23,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356558190] [2022-02-09 02:32:23,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:32:23,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:23,679 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) [2022-02-09 02:32:23,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-09 02:32:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 02:32:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:23,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:24,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356558190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:24,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:24,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-02-09 02:32:24,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560376015] [2022-02-09 02:32:24,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:24,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:24,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:24,035 INFO L87 Difference]: Start difference. First operand 33948 states and 145795 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2022-02-09 02:32:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:24,907 INFO L93 Difference]: Finished difference Result 55162 states and 224042 transitions. [2022-02-09 02:32:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 02:32:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 28 [2022-02-09 02:32:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:25,142 INFO L225 Difference]: With dead ends: 55162 [2022-02-09 02:32:25,142 INFO L226 Difference]: Without dead ends: 55087 [2022-02-09 02:32:25,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-02-09 02:32:25,143 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 411 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:25,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 504 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55087 states. [2022-02-09 02:32:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55087 to 33948. [2022-02-09 02:32:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33948 states, 33947 states have (on average 4.294076059740183) internal successors, (145771), 33947 states have internal predecessors, (145771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 145771 transitions. [2022-02-09 02:32:26,542 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 145771 transitions. Word has length 28 [2022-02-09 02:32:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:26,542 INFO L470 AbstractCegarLoop]: Abstraction has 33948 states and 145771 transitions. [2022-02-09 02:32:26,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2022-02-09 02:32:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 145771 transitions. [2022-02-09 02:32:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:26,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:26,826 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] [2022-02-09 02:32:26,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:27,035 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 [2022-02-09 02:32:27,035 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1536799755, now seen corresponding path program 10 times [2022-02-09 02:32:27,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:27,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071196588] [2022-02-09 02:32:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:27,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:27,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071196588] [2022-02-09 02:32:27,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071196588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:27,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440508694] [2022-02-09 02:32:27,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:32:27,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:27,062 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) [2022-02-09 02:32:27,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-09 02:32:27,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:32:27,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:27,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:27,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:27,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440508694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:27,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:27,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-02-09 02:32:27,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781925263] [2022-02-09 02:32:27,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:27,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:27,213 INFO L87 Difference]: Start difference. First operand 33948 states and 145771 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:28,198 INFO L93 Difference]: Finished difference Result 64841 states and 263328 transitions. [2022-02-09 02:32:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 02:32:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:28,645 INFO L225 Difference]: With dead ends: 64841 [2022-02-09 02:32:28,645 INFO L226 Difference]: Without dead ends: 64841 [2022-02-09 02:32:28,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-02-09 02:32:28,646 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 452 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:28,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 484 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64841 states. [2022-02-09 02:32:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64841 to 34786. [2022-02-09 02:32:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34786 states, 34785 states have (on average 4.2928273681184415) internal successors, (149326), 34785 states have internal predecessors, (149326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34786 states to 34786 states and 149326 transitions. [2022-02-09 02:32:30,337 INFO L78 Accepts]: Start accepts. Automaton has 34786 states and 149326 transitions. Word has length 28 [2022-02-09 02:32:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:30,337 INFO L470 AbstractCegarLoop]: Abstraction has 34786 states and 149326 transitions. [2022-02-09 02:32:30,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34786 states and 149326 transitions. [2022-02-09 02:32:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:30,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:30,650 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] [2022-02-09 02:32:30,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:30,857 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 [2022-02-09 02:32:30,857 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:30,858 INFO L85 PathProgramCache]: Analyzing trace with hash 808212756, now seen corresponding path program 11 times [2022-02-09 02:32:30,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:30,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244369760] [2022-02-09 02:32:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:30,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:30,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:30,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244369760] [2022-02-09 02:32:30,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244369760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:30,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059731033] [2022-02-09 02:32:30,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:32:30,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:30,890 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) [2022-02-09 02:32:30,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-09 02:32:30,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 02:32:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:30,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:31,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059731033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:31,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:31,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-02-09 02:32:31,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206592845] [2022-02-09 02:32:31,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:31,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:31,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:31,039 INFO L87 Difference]: Start difference. First operand 34786 states and 149326 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-02-09 02:32:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:31,960 INFO L93 Difference]: Finished difference Result 52787 states and 215305 transitions. [2022-02-09 02:32:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:32:31,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 28 [2022-02-09 02:32:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:32,203 INFO L225 Difference]: With dead ends: 52787 [2022-02-09 02:32:32,203 INFO L226 Difference]: Without dead ends: 52739 [2022-02-09 02:32:32,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-09 02:32:32,204 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 420 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:32,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 451 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52739 states. [2022-02-09 02:32:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52739 to 34788. [2022-02-09 02:32:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34788 states, 34787 states have (on average 4.292206858884066) internal successors, (149313), 34787 states have internal predecessors, (149313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34788 states to 34788 states and 149313 transitions. [2022-02-09 02:32:33,637 INFO L78 Accepts]: Start accepts. Automaton has 34788 states and 149313 transitions. Word has length 28 [2022-02-09 02:32:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:33,637 INFO L470 AbstractCegarLoop]: Abstraction has 34788 states and 149313 transitions. [2022-02-09 02:32:33,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-02-09 02:32:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 34788 states and 149313 transitions. [2022-02-09 02:32:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:33,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:33,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:32:33,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-09 02:32:33,939 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 [2022-02-09 02:32:33,939 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash 389234323, now seen corresponding path program 12 times [2022-02-09 02:32:33,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:33,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875906845] [2022-02-09 02:32:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:33,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:33,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:33,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875906845] [2022-02-09 02:32:33,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875906845] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:33,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770586435] [2022-02-09 02:32:33,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:32:33,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:33,973 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) [2022-02-09 02:32:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-09 02:32:33,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:32:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:33,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:34,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:34,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770586435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:34,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:34,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-02-09 02:32:34,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780572576] [2022-02-09 02:32:34,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:34,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-09 02:32:34,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-09 02:32:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-09 02:32:34,134 INFO L87 Difference]: Start difference. First operand 34788 states and 149313 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2022-02-09 02:32:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:35,357 INFO L93 Difference]: Finished difference Result 65944 states and 267103 transitions. [2022-02-09 02:32:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:32:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 28 [2022-02-09 02:32:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:35,829 INFO L225 Difference]: With dead ends: 65944 [2022-02-09 02:32:35,829 INFO L226 Difference]: Without dead ends: 65944 [2022-02-09 02:32:35,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:32:35,830 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 504 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:35,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 536 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:32:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65944 states. [2022-02-09 02:32:37,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65944 to 34898. [2022-02-09 02:32:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34898 states, 34897 states have (on average 4.264378026764478) internal successors, (148814), 34897 states have internal predecessors, (148814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34898 states to 34898 states and 148814 transitions. [2022-02-09 02:32:37,443 INFO L78 Accepts]: Start accepts. Automaton has 34898 states and 148814 transitions. Word has length 28 [2022-02-09 02:32:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:37,443 INFO L470 AbstractCegarLoop]: Abstraction has 34898 states and 148814 transitions. [2022-02-09 02:32:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) 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) [2022-02-09 02:32:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34898 states and 148814 transitions. [2022-02-09 02:32:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:37,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:37,766 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] [2022-02-09 02:32:37,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:37,966 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 [2022-02-09 02:32:37,966 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1741470504, now seen corresponding path program 13 times [2022-02-09 02:32:37,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:37,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963566028] [2022-02-09 02:32:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:37,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:37,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:37,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963566028] [2022-02-09 02:32:37,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963566028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:37,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039654059] [2022-02-09 02:32:37,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:32:37,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:37,999 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) [2022-02-09 02:32:38,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-09 02:32:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:38,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:38,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039654059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:38,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:38,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-02-09 02:32:38,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828281194] [2022-02-09 02:32:38,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:38,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-09 02:32:38,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-09 02:32:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-09 02:32:38,142 INFO L87 Difference]: Start difference. First operand 34898 states and 148814 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2022-02-09 02:32:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:39,165 INFO L93 Difference]: Finished difference Result 46707 states and 190026 transitions. [2022-02-09 02:32:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:32:39,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 28 [2022-02-09 02:32:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:39,372 INFO L225 Difference]: With dead ends: 46707 [2022-02-09 02:32:39,373 INFO L226 Difference]: Without dead ends: 46659 [2022-02-09 02:32:39,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-09 02:32:39,373 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 411 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:39,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 505 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46659 states. [2022-02-09 02:32:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46659 to 35216. [2022-02-09 02:32:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.257532301576033) internal successors, (149929), 35215 states have internal predecessors, (149929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149929 transitions. [2022-02-09 02:32:40,723 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149929 transitions. Word has length 28 [2022-02-09 02:32:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:40,723 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149929 transitions. [2022-02-09 02:32:40,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2022-02-09 02:32:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149929 transitions. [2022-02-09 02:32:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:40,821 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:40,821 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] [2022-02-09 02:32:40,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-09 02:32:41,023 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 [2022-02-09 02:32:41,023 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1733254908, now seen corresponding path program 14 times [2022-02-09 02:32:41,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:41,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225479216] [2022-02-09 02:32:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:41,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:41,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:41,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225479216] [2022-02-09 02:32:41,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225479216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:41,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479505505] [2022-02-09 02:32:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:32:41,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:41,061 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) [2022-02-09 02:32:41,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-09 02:32:41,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:32:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:41,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:41,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479505505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:41,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:41,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:41,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874622939] [2022-02-09 02:32:41,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:41,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:41,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:41,227 INFO L87 Difference]: Start difference. First operand 35216 states and 149929 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2022-02-09 02:32:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:42,189 INFO L93 Difference]: Finished difference Result 60164 states and 241689 transitions. [2022-02-09 02:32:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 02:32:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 28 [2022-02-09 02:32:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:42,443 INFO L225 Difference]: With dead ends: 60164 [2022-02-09 02:32:42,443 INFO L226 Difference]: Without dead ends: 60164 [2022-02-09 02:32:42,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-02-09 02:32:42,444 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 532 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:42,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 322 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60164 states. [2022-02-09 02:32:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60164 to 35216. [2022-02-09 02:32:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.2527048132897916) internal successors, (149759), 35215 states have internal predecessors, (149759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149759 transitions. [2022-02-09 02:32:44,069 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149759 transitions. Word has length 28 [2022-02-09 02:32:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:44,069 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149759 transitions. [2022-02-09 02:32:44,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2022-02-09 02:32:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149759 transitions. [2022-02-09 02:32:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:44,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:44,167 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] [2022-02-09 02:32:44,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-09 02:32:44,368 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 [2022-02-09 02:32:44,368 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash -964819297, now seen corresponding path program 15 times [2022-02-09 02:32:44,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:44,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623742567] [2022-02-09 02:32:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:44,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:44,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:44,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623742567] [2022-02-09 02:32:44,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623742567] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:44,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930784881] [2022-02-09 02:32:44,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:32:44,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:44,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:44,416 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) [2022-02-09 02:32:44,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-09 02:32:44,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 02:32:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:44,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:44,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930784881] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:44,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:44,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:44,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435937491] [2022-02-09 02:32:44,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:44,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:44,557 INFO L87 Difference]: Start difference. First operand 35216 states and 149759 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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) [2022-02-09 02:32:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:45,444 INFO L93 Difference]: Finished difference Result 42905 states and 176555 transitions. [2022-02-09 02:32:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 02:32:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 28 [2022-02-09 02:32:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:45,627 INFO L225 Difference]: With dead ends: 42905 [2022-02-09 02:32:45,627 INFO L226 Difference]: Without dead ends: 42880 [2022-02-09 02:32:45,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-02-09 02:32:45,627 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 190 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 627 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:45,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42880 states. [2022-02-09 02:32:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42880 to 35216. [2022-02-09 02:32:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.252364049410763) internal successors, (149747), 35215 states have internal predecessors, (149747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149747 transitions. [2022-02-09 02:32:46,873 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149747 transitions. Word has length 28 [2022-02-09 02:32:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:46,873 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149747 transitions. [2022-02-09 02:32:46,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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) [2022-02-09 02:32:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149747 transitions. [2022-02-09 02:32:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:46,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:46,966 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] [2022-02-09 02:32:46,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:47,167 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 [2022-02-09 02:32:47,167 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:47,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1864642917, now seen corresponding path program 16 times [2022-02-09 02:32:47,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:47,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170155694] [2022-02-09 02:32:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:47,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:47,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:47,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170155694] [2022-02-09 02:32:47,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170155694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:47,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248142597] [2022-02-09 02:32:47,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:32:47,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:47,196 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) [2022-02-09 02:32:47,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-09 02:32:47,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:32:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:47,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:47,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:47,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248142597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:47,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:47,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:47,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406053102] [2022-02-09 02:32:47,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:47,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:47,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:47,357 INFO L87 Difference]: Start difference. First operand 35216 states and 149747 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-02-09 02:32:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:48,266 INFO L93 Difference]: Finished difference Result 48638 states and 199829 transitions. [2022-02-09 02:32:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 02:32:48,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 28 [2022-02-09 02:32:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:48,490 INFO L225 Difference]: With dead ends: 48638 [2022-02-09 02:32:48,490 INFO L226 Difference]: Without dead ends: 48638 [2022-02-09 02:32:48,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-02-09 02:32:48,491 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 285 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:48,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 533 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48638 states. [2022-02-09 02:32:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48638 to 35386. [2022-02-09 02:32:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.251292920729123) internal successors, (150432), 35385 states have internal predecessors, (150432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 150432 transitions. [2022-02-09 02:32:49,759 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 150432 transitions. Word has length 28 [2022-02-09 02:32:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:49,760 INFO L470 AbstractCegarLoop]: Abstraction has 35386 states and 150432 transitions. [2022-02-09 02:32:49,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-02-09 02:32:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 150432 transitions. [2022-02-09 02:32:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:49,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:49,844 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] [2022-02-09 02:32:49,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-09 02:32:50,045 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 [2022-02-09 02:32:50,045 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash -85311868, now seen corresponding path program 17 times [2022-02-09 02:32:50,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:50,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211302822] [2022-02-09 02:32:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:50,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:50,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:50,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211302822] [2022-02-09 02:32:50,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211302822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:50,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35109054] [2022-02-09 02:32:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:32:50,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:50,077 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) [2022-02-09 02:32:50,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-09 02:32:50,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 02:32:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:50,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 02:32:50,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35109054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:50,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:50,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-02-09 02:32:50,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754765556] [2022-02-09 02:32:50,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:50,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-09 02:32:50,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-09 02:32:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-09 02:32:50,219 INFO L87 Difference]: Start difference. First operand 35386 states and 150432 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:51,116 INFO L93 Difference]: Finished difference Result 54151 states and 216784 transitions. [2022-02-09 02:32:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-09 02:32:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:51,334 INFO L225 Difference]: With dead ends: 54151 [2022-02-09 02:32:51,334 INFO L226 Difference]: Without dead ends: 54127 [2022-02-09 02:32:51,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-02-09 02:32:51,335 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 467 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:51,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 412 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54127 states. [2022-02-09 02:32:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54127 to 35386. [2022-02-09 02:32:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.2509537939805) internal successors, (150420), 35385 states have internal predecessors, (150420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 150420 transitions. [2022-02-09 02:32:52,705 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 150420 transitions. Word has length 28 [2022-02-09 02:32:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:52,705 INFO L470 AbstractCegarLoop]: Abstraction has 35386 states and 150420 transitions. [2022-02-09 02:32:52,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 150420 transitions. [2022-02-09 02:32:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:52,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:52,798 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] [2022-02-09 02:32:52,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-09 02:32:52,999 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 [2022-02-09 02:32:52,999 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:52,999 INFO L85 PathProgramCache]: Analyzing trace with hash -504290301, now seen corresponding path program 18 times [2022-02-09 02:32:53,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:53,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378191281] [2022-02-09 02:32:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:53,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:53,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:53,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378191281] [2022-02-09 02:32:53,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378191281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:53,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116341454] [2022-02-09 02:32:53,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:32:53,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:53,027 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) [2022-02-09 02:32:53,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-09 02:32:53,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:32:53,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:32:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:53,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:53,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116341454] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:53,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:53,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:32:53,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992661001] [2022-02-09 02:32:53,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:53,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:53,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:53,164 INFO L87 Difference]: Start difference. First operand 35386 states and 150420 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2022-02-09 02:32:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:54,740 INFO L93 Difference]: Finished difference Result 66871 states and 276078 transitions. [2022-02-09 02:32:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-09 02:32:54,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 28 [2022-02-09 02:32:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:55,105 INFO L225 Difference]: With dead ends: 66871 [2022-02-09 02:32:55,105 INFO L226 Difference]: Without dead ends: 66871 [2022-02-09 02:32:55,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:32:55,106 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 402 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:55,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 794 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 02:32:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66871 states. [2022-02-09 02:32:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66871 to 36382. [2022-02-09 02:32:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36382 states, 36381 states have (on average 4.2540336989087715) internal successors, (154766), 36381 states have internal predecessors, (154766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36382 states to 36382 states and 154766 transitions. [2022-02-09 02:32:56,662 INFO L78 Accepts]: Start accepts. Automaton has 36382 states and 154766 transitions. Word has length 28 [2022-02-09 02:32:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:32:56,663 INFO L470 AbstractCegarLoop]: Abstraction has 36382 states and 154766 transitions. [2022-02-09 02:32:56,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2022-02-09 02:32:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 36382 states and 154766 transitions. [2022-02-09 02:32:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:32:56,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:32:56,758 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] [2022-02-09 02:32:56,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-09 02:32:56,958 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 [2022-02-09 02:32:56,959 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:32:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:32:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1659972168, now seen corresponding path program 19 times [2022-02-09 02:32:56,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:32:56,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931641325] [2022-02-09 02:32:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:32:56,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:32:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:56,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:32:56,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931641325] [2022-02-09 02:32:56,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931641325] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:32:56,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284024486] [2022-02-09 02:32:56,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 02:32:56,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:32:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:32:56,988 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) [2022-02-09 02:32:56,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-09 02:32:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:32:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:32:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:32:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:57,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:32:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:32:57,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284024486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:32:57,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:32:57,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-02-09 02:32:57,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615355148] [2022-02-09 02:32:57,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:32:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:32:57,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:32:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:32:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:32:57,486 INFO L87 Difference]: Start difference. First operand 36382 states and 154766 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:32:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:32:58,383 INFO L93 Difference]: Finished difference Result 63646 states and 253451 transitions. [2022-02-09 02:32:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:32:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:32:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:32:58,937 INFO L225 Difference]: With dead ends: 63646 [2022-02-09 02:32:58,938 INFO L226 Difference]: Without dead ends: 63550 [2022-02-09 02:32:58,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:32:58,938 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 492 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 02:32:58,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 488 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 02:32:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63550 states. [2022-02-09 02:33:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63550 to 36382. [2022-02-09 02:33:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36382 states, 36381 states have (on average 4.253374013908359) internal successors, (154742), 36381 states have internal predecessors, (154742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:00,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36382 states to 36382 states and 154742 transitions. [2022-02-09 02:33:00,495 INFO L78 Accepts]: Start accepts. Automaton has 36382 states and 154742 transitions. Word has length 28 [2022-02-09 02:33:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:33:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 36382 states and 154742 transitions. [2022-02-09 02:33:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36382 states and 154742 transitions. [2022-02-09 02:33:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:33:00,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:33:00,590 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] [2022-02-09 02:33:00,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-09 02:33:00,790 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 [2022-02-09 02:33:00,790 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:33:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:33:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1771747479, now seen corresponding path program 20 times [2022-02-09 02:33:00,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:33:00,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233196099] [2022-02-09 02:33:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:33:00,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:33:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:33:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:00,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:33:00,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233196099] [2022-02-09 02:33:00,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233196099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:33:00,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805804285] [2022-02-09 02:33:00,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 02:33:00,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:33:00,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:33:00,822 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) [2022-02-09 02:33:00,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-09 02:33:00,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:33:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:33:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:33:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:33:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:00,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:33:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:00,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805804285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:33:00,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:33:00,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-09 02:33:00,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116489925] [2022-02-09 02:33:00,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:33:00,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:33:00,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:33:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:33:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:33:00,964 INFO L87 Difference]: Start difference. First operand 36382 states and 154742 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:33:02,325 INFO L93 Difference]: Finished difference Result 56646 states and 234882 transitions. [2022-02-09 02:33:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-09 02:33:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:33:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:33:02,584 INFO L225 Difference]: With dead ends: 56646 [2022-02-09 02:33:02,584 INFO L226 Difference]: Without dead ends: 56646 [2022-02-09 02:33:02,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-02-09 02:33:02,585 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 331 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 02:33:02,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 830 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 02:33:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56646 states. [2022-02-09 02:33:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56646 to 36990. [2022-02-09 02:33:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36990 states, 36989 states have (on average 4.222228230014329) internal successors, (156176), 36989 states have internal predecessors, (156176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36990 states to 36990 states and 156176 transitions. [2022-02-09 02:33:03,991 INFO L78 Accepts]: Start accepts. Automaton has 36990 states and 156176 transitions. Word has length 28 [2022-02-09 02:33:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:33:03,991 INFO L470 AbstractCegarLoop]: Abstraction has 36990 states and 156176 transitions. [2022-02-09 02:33:03,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 36990 states and 156176 transitions. [2022-02-09 02:33:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:33:04,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:33:04,090 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] [2022-02-09 02:33:04,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-09 02:33:04,291 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 [2022-02-09 02:33:04,291 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:33:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:33:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1358668156, now seen corresponding path program 21 times [2022-02-09 02:33:04,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:33:04,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606657769] [2022-02-09 02:33:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:33:04,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:33:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:33:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:04,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:33:04,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606657769] [2022-02-09 02:33:04,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606657769] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:33:04,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563572919] [2022-02-09 02:33:04,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 02:33:04,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:33:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:33:04,333 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) [2022-02-09 02:33:04,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-09 02:33:04,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 02:33:04,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:33:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:33:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:33:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:04,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:33:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:04,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563572919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:33:04,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:33:04,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-09 02:33:04,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288366819] [2022-02-09 02:33:04,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:33:04,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 02:33:04,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:33:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 02:33:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-09 02:33:04,474 INFO L87 Difference]: Start difference. First operand 36990 states and 156176 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:33:05,551 INFO L93 Difference]: Finished difference Result 55481 states and 220242 transitions. [2022-02-09 02:33:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 02:33:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:33:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:33:05,775 INFO L225 Difference]: With dead ends: 55481 [2022-02-09 02:33:05,775 INFO L226 Difference]: Without dead ends: 55385 [2022-02-09 02:33:05,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:33:05,776 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 402 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:33:05,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 560 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:33:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55385 states. [2022-02-09 02:33:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55385 to 37614. [2022-02-09 02:33:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37614 states, 37613 states have (on average 4.209661553186399) internal successors, (158338), 37613 states have internal predecessors, (158338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37614 states to 37614 states and 158338 transitions. [2022-02-09 02:33:07,471 INFO L78 Accepts]: Start accepts. Automaton has 37614 states and 158338 transitions. Word has length 28 [2022-02-09 02:33:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:33:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 37614 states and 158338 transitions. [2022-02-09 02:33:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 37614 states and 158338 transitions. [2022-02-09 02:33:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:33:07,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:33:07,590 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] [2022-02-09 02:33:07,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-09 02:33:07,790 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 [2022-02-09 02:33:07,791 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:33:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:33:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1709825530, now seen corresponding path program 22 times [2022-02-09 02:33:07,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:33:07,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860313484] [2022-02-09 02:33:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:33:07,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:33:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:33:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:07,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:33:07,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860313484] [2022-02-09 02:33:07,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860313484] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:33:07,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564480806] [2022-02-09 02:33:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 02:33:07,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:33:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:33:07,824 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) [2022-02-09 02:33:07,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 02:33:07,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:33:07,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-09 02:33:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:33:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:33:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:07,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:33:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:07,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564480806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:33:07,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:33:07,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-02-09 02:33:07,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882996084] [2022-02-09 02:33:07,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:33:07,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-09 02:33:07,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:33:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-09 02:33:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-09 02:33:07,984 INFO L87 Difference]: Start difference. First operand 37614 states and 158338 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2022-02-09 02:33:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:33:09,272 INFO L93 Difference]: Finished difference Result 64292 states and 259631 transitions. [2022-02-09 02:33:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 02:33:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 28 [2022-02-09 02:33:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:33:09,595 INFO L225 Difference]: With dead ends: 64292 [2022-02-09 02:33:09,596 INFO L226 Difference]: Without dead ends: 64292 [2022-02-09 02:33:09,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 02:33:09,596 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 532 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 02:33:09,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 471 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 02:33:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64292 states. [2022-02-09 02:33:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64292 to 36800. [2022-02-09 02:33:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36800 states, 36799 states have (on average 4.195141172314465) internal successors, (154377), 36799 states have internal predecessors, (154377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36800 states to 36800 states and 154377 transitions. [2022-02-09 02:33:11,147 INFO L78 Accepts]: Start accepts. Automaton has 36800 states and 154377 transitions. Word has length 28 [2022-02-09 02:33:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:33:11,147 INFO L470 AbstractCegarLoop]: Abstraction has 36800 states and 154377 transitions. [2022-02-09 02:33:11,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2022-02-09 02:33:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 36800 states and 154377 transitions. [2022-02-09 02:33:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-09 02:33:11,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:33:11,243 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] [2022-02-09 02:33:11,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-02-09 02:33:11,443 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 [2022-02-09 02:33:11,444 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:33:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:33:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 109327923, now seen corresponding path program 23 times [2022-02-09 02:33:11,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:33:11,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147050144] [2022-02-09 02:33:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:33:11,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:33:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:33:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:11,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:33:11,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147050144] [2022-02-09 02:33:11,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147050144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:33:11,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573918370] [2022-02-09 02:33:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 02:33:11,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:33:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:33:11,484 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) [2022-02-09 02:33:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-09 02:33:11,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 02:33:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:33:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 02:33:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 02:33:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 02:33:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:11,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573918370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 02:33:11,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 02:33:11,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-02-09 02:33:11,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038324787] [2022-02-09 02:33:11,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 02:33:11,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-09 02:33:11,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 02:33:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-09 02:33:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-09 02:33:11,638 INFO L87 Difference]: Start difference. First operand 36800 states and 154377 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 02:33:12,598 INFO L93 Difference]: Finished difference Result 46938 states and 189022 transitions. [2022-02-09 02:33:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 02:33:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-09 02:33:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 02:33:12,786 INFO L225 Difference]: With dead ends: 46938 [2022-02-09 02:33:12,786 INFO L226 Difference]: Without dead ends: 46888 [2022-02-09 02:33:12,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-09 02:33:12,786 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 385 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 02:33:12,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 476 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 02:33:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46888 states. [2022-02-09 02:33:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46888 to 36135. [2022-02-09 02:33:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36135 states, 36134 states have (on average 4.197570155532186) internal successors, (151675), 36134 states have internal predecessors, (151675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36135 states to 36135 states and 151675 transitions. [2022-02-09 02:33:14,169 INFO L78 Accepts]: Start accepts. Automaton has 36135 states and 151675 transitions. Word has length 28 [2022-02-09 02:33:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 02:33:14,169 INFO L470 AbstractCegarLoop]: Abstraction has 36135 states and 151675 transitions. [2022-02-09 02:33:14,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-09 02:33:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 36135 states and 151675 transitions. [2022-02-09 02:33:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 02:33:14,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 02:33:14,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-09 02:33:14,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-09 02:33:14,468 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 [2022-02-09 02:33:14,468 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-02-09 02:33:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 02:33:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 993334789, now seen corresponding path program 24 times [2022-02-09 02:33:14,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 02:33:14,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741402894] [2022-02-09 02:33:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 02:33:14,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 02:33:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 02:33:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 02:33:14,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 02:33:14,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741402894] [2022-02-09 02:33:14,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741402894] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 02:33:14,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309934664] [2022-02-09 02:33:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 02:33:14,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 02:33:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 02:33:14,543 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) [2022-02-09 02:33:14,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-09 02:33:14,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 02:33:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 02:33:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-09 02:33:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates...